15274
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
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 26208
- Proper Divisor Sum (Aliquot Sum)
- 10934
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6540
- Möbius Function
- -1
- Radical
- 15274
- 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
- 40
- 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
- Number of proper factorizations of p1^n*p2^2, where p1 and p2 are distinct primes.at n=22A031125
- Number of 4 X n binary matrices with no zero rows or columns, up to row and column permutation.at n=7A055082
- Triangular array giving number of bipartite graphs with n vertices, no isolated vertices and a distinguished bipartite block with k=1..n-1 vertices, up to isomorphism.at n=58A056152
- Interprimes which are of the form s*prime, s=14.at n=25A075289
- a(n) = A076969(n)^(1/3).at n=38A076970
- Number of permutations of decimal digits of 2^n which yield a prime.at n=30A086151
- Triangle related to the divergent series 1^m*1! - 2^m*2! + 3^m*3! - 4^m*4! + ... for m >= -1.at n=51A163940
- Fourth right hand column of triangle A163940.at n=6A163941
- Number of n X 4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4.at n=5A196452
- Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4.at n=3A196454
- T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4.at n=39A196456
- T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4.at n=41A196456
- Triangle read by rows: T(n,m) (n >= 1, 1 <= m <= n) = number of set partitions of [n], avoiding 12343, with m blocks.at n=48A250118
- Number of n-bit binary strings in which the length of any run of ones is a power of two.at n=15A253511
- Number of Seidel matrices of order 2n for which Cameron's first cohomology invariant is nonzero.at n=5A263625
- The number of monic integer polynomials of degree n all of whose roots are distinct and of modulus at most 1.at n=27A280709
- The number of partitions of n which represent Chomp positions with Sprague-Grundy value 4.at n=54A284690
- a(n) is the position of the first occurrence of n^3 in the concatenation of the positive integers in decimal representation.at n=15A290787
- Sphenic numbers k such that none of k-2, k-1, k+1 and k+2 is squarefree.at n=42A362561