15464
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 29010
- Proper Divisor Sum (Aliquot Sum)
- 13546
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7728
- Möbius Function
- 0
- Radical
- 3866
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 27
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Values of A038007 not ending in 6 or 8.at n=33A038009
- a(n) is the smallest integer such that the sum of any three ordered terms a(k), k <= n, is unique.at n=21A051912
- Interprimes which are of the form s*prime, s=8.at n=23A075283
- Numbers k such that (k!! + (k+1)!! + 1)/2 is prime.at n=19A076208
- Convolution of sequence of primes with sequence sigma(n).at n=25A086718
- Number of partitions of n such that the set of parts has an even number of elements.at n=39A092306
- Real part of absolute Gaussian perfect numbers, in order of increasing magnitude.at n=39A102531
- a(n) = n^4 + 4*n^3 + 12*n^2 + 24*n + 24.at n=10A127878
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, 1, 1), (1, -1, -1), (1, 0, -1)}.at n=9A148809
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (0, 0, -1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.at n=9A149835
- Partial sums of ceiling(Fibonacci(n)/3).at n=22A179041
- Number of n X 3 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value within 3 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.at n=10A252999
- Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 30", based on the 5-celled von Neumann neighborhood.at n=7A269754
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 278", based on the 5-celled von Neumann neighborhood.at n=36A271097
- Consider the function G(m) that adds to m a fractional part whose digits are the digits of m (informally, G(m) = m.m). Sequence lists integers of the form Sum_{i=1..k} G(i) for some k.at n=3A275572
- a(n) is a number of lattice points in 3D Cartesian grid between cube with edge length 2*n centered in origin and its inscribed sphere. Three pairs of the cube's faces are parallel to the planes XOY, XOZ, YOZ respectively.at n=16A303743
- Numbers k for which phi(k) = phi(k''), where phi is the Euler totient function (A000010) and k'' the second arithmetic derivative of k (A068346).at n=32A352331
- a(n) = n! * Sum_{k=0..n} (-1)^(n-k) * k^4 / k!.at n=8A368717
- Number of length n inversion sequences avoiding the patterns 110 and 201.at n=8A374546