17430
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 32
- Divisor Sum
- 48384
- Proper Divisor Sum (Aliquot Sum)
- 30954
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 3936
- Möbius Function
- -1
- Radical
- 17430
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 5
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
- no
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 141
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- 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
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 44.at n=5A031722
- Triangles in open triangular matchstick arrangement (triangle minus one side) of side n.at n=41A045947
- Partial sums of second pentagonal numbers with even index (A049453).at n=20A051895
- Triangle read by rows: T(n,k) is the number of noncrossing trees with n edges and k leaves.at n=31A091320
- Coefficients of the expansion in 1/(2d) of the Green function G(0,1) for brownian motion.at n=7A105227
- Records for unitary abundant numbers, i.e., those integers which set a record for having a greater unitary abundance than any of their predecessors.at n=40A129499
- a(n) = 36*n^2 + 6.at n=21A158479
- Least even number m which can be written as sum of 2n primes p(1) < ... < p(2n) < m/2 such that m-p(i) is also prime for i=1,...,2n.at n=26A191837
- a(n) is the optimal wire-length for an n X n grid.at n=26A195647
- Number of (w,x,y,z) with all terms in {1,...,n} and 2|w-x|>=n+|y-z|.at n=19A212688
- Number of (weakly) unimodal compositions of n where all parts 1, 2, ..., m appear where m is the largest part.at n=28A227038
- Number of compositions of n into distinct parts with exactly one descent.at n=33A241720
- Rhonda numbers in sexagesimal number system.at n=3A255731
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 94", based on the 5-celled von Neumann neighborhood.at n=38A270135
- O.g.f. A(x) satisfies: [x^n] exp( -n*A(x) ) / (1 - n*x)^n = 0, for n > 0.at n=4A319940
- Number of widely recursively normal integer partitions of n.at n=48A332295
- Common difference corresponding to increasing arithmetic progression of at least n >= 2 primes whose first term is A284708(n); a(1) = 1.at n=9A361492
- Squarefree composite numbers m such that k - m^2 < m, where k is the smallest number greater than m^2 such that rad(k) | m.at n=26A362003
- Index where n first appears in A381597.at n=32A381599
- Consecutive states of the linear congruential pseudo-random number generator (1093*s + 18257) mod 86436 when started at s=1.at n=13A385340