12595
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
- 8
- Divisor Sum
- 16560
- Proper Divisor Sum (Aliquot Sum)
- 3965
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 9120
- Möbius Function
- -1
- Radical
- 12595
- Omega Function (Ω)
- 3
- 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
- 63
- 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
- no
- Odd
- yes
Appears in sequences
- Exponential convolution of Fibonacci numbers with themselves (divided by 2).at n=10A014335
- Vampire numbers: (definition 1): n has a nontrivial factorization using n's digits.at n=31A020342
- Numbers whose set of base-16 digits is {1,3}.at n=25A032923
- Composite numbers k such that digits in k and in juxtaposition of prime factors of k are the same (apart from multiplicity).at n=27A035141
- a(n) = floor(a(n-1)/2) + a(n-2) with a(0)=1, a(1)=2.at n=38A064650
- a(n) = n * (10*n^2 - 6n + 1) = n * A087348(n).at n=11A104099
- Smaller side not divisible by 37 of right triangles with integer sides and integer side inscribed squares with two vertices on the hypotenuse.at n=15A123697
- Sum of the digits of 5^(2^n).at n=12A124307
- Zero followed by partial sums of A059100, starting at n=1.at n=33A145068
- a(n) is the first occurrence of n in sequence A209266.at n=27A211389
- Numbers k such that A084937(3k) > A084937(3k+1).at n=32A249689
- Numbers k such that 4*10^k + 19 is prime.at n=27A271548
- a(n) = number of n-digit binary numbers in which the first k and last k digits have a Hamming distance of 1 or less, for all k from 1 to n.at n=43A288793
- Numbers that are the sum of six fourth powers in four or more ways.at n=9A345561
- Numbers that are the sum of six fourth powers in exactly four ways.at n=9A345816
- Triangle T(n,k), n>=0, 0<=k<=n, read by rows, where column k is (1/k!) times the k-fold exponential convolution of Fibonacci numbers with themselves.at n=57A346415
- After initial 0, numbers k such that A327860(k) is a multiple of k.at n=43A351087
- Indices of records of A070266.at n=19A353243