12955
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 15552
- Proper Divisor Sum (Aliquot Sum)
- 2597
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10360
- Möbius Function
- 1
- Radical
- 12955
- Omega Function (Ω)
- 2
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 107
- Smith Number
- yes
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- no
- Odd
- yes
Appears in sequences
- Vampire numbers: (definition 1): n has a nontrivial factorization using n's digits.at n=37A020342
- Composites that use the same digits as their prime factorization.at n=6A025283
- Super-5 Numbers (5 * n^5 contains substring '55555' in its decimal expansion).at n=3A032745
- Numbers in which all pairs of consecutive base-7 digits differ by 3.at n=38A033078
- Composite numbers k such that digits in k and in juxtaposition of prime factors of k are the same (apart from multiplicity).at n=28A035141
- Base-7 palindromes that start with 5.at n=35A043019
- Sequence A001033 gives the numbers n such that the sum of the squares of n consecutive odd numbers x^2 + (x+2)^2 + ... +(x+2n-2)^2 = k^2 for some integer k. For each n, this sequence gives the least value of x.at n=36A056131
- 1, together with numbers n that are the product of two primes p and q such that the multiset of the digits of n coincides with the multiset of the digits of p and q.at n=2A080718
- 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, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.at n=9A148805
- Composite numbers having the same digits as their prime factors (with multiplicity), excluding zero digits.at n=2A176670
- Number of (n+4)X5 binary arrays with every 1 having exactly three king-move neighbors equal to 1 but with no 2X2 blocks of 1s.at n=12A183458
- Number of idempotent n X n 0..5 matrices of rank n-1.at n=4A224330
- T(n,k)=Number of idempotent n X n 0..k matrices of rank n-1.at n=40A224333
- Number of idempotent 5 X 5 0..n matrices of rank 4.at n=4A224336
- Smallest first term of a sequence of exactly n consecutive hoax numbers.at n=2A235766
- Composite numbers n such that the distinct digits in n and the distinct digits in the proper divisors of n are the same.at n=8A237713
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 590", based on the 5-celled von Neumann neighborhood.at n=34A273117
- Composite numbers having the same digits as their prime factors (with multiplicity), including zero digits.at n=1A280928
- Numbers k such that the set of all the decimal digits of k is the same as the set of all the decimal digits of the proper divisors of k.at n=9A282755
- Partial sums of A299281.at n=20A299282