13294
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 22104
- Proper Divisor Sum (Aliquot Sum)
- 8810
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5984
- Möbius Function
- 0
- Radical
- 782
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
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
- no
- Narcissistic Number
- no
- Collatz Steps
- 120
- 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
- T(2n,n-1), T given by A026568.at n=7A026575
- a(n) = T(2*n, n-1), where T is given by A026584.at n=7A026591
- Consider the Diophantine equation x^3 + y^3 = z^3 + 1 (1 < x < y < z) or 'Fermat near misses'. Arrange solutions by increasing values of z (see A050791). Sequence gives values of x.at n=18A050792
- Expansion of 1/((1-x)*(1-x^2)*(1-x^3)*(1-x^4))^2.at n=23A117486
- a(n) = (2*n^3 + 5*n^2 - 17*n)/2.at n=22A162259
- Number of binary strings of length 2n that contain the ones' complements and the reversals of each of their two halves.at n=19A237502
- Numbers n such that n, p=prime(n) and q=prime(p) have the same sum of digits.at n=22A261142
- Numbers n such that Bernoulli number B_{n} has denominator 282.at n=36A272184
- Sum of the fifth largest parts of the partitions of n into 9 parts.at n=41A326469
- Number of regions in a regular n-gon with all diagonals drawn whose edges all have the same number of facing edges.at n=43A351129
- Nonsquarefree numbers k that are not divisible by p^p for any prime p, and for which A276085(k) is a multiple of A003557(k), where A276085 is the primorial base log-function.at n=47A391866
- Intersection of A391845 and A391866.at n=41A392592