13095
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 23520
- Proper Divisor Sum (Aliquot Sum)
- 10425
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6912
- Möbius Function
- 0
- Radical
- 1455
- Omega Function (Ω)
- 5
- 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
- 76
- 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
- no
- Odd
- yes
Appears in sequences
- Decimal part of n^(1/11) starts with a 'nine digits' anagram.at n=2A034286
- Gaps of 10 in sequence A038593 (upper terms).at n=10A038660
- Numbers ending with '5' that are the difference of two positive cubes.at n=35A038860
- Numbers k such that k^18 == 1 (mod 19^3).at n=33A056089
- Numbers n such that n | 6^n + 5^n + 4^n.at n=41A057235
- a(n) = 6*a(n-1) - 3*a(n-2), a(0)=1, a(1)=3.at n=6A084120
- Indices of primes in sequence defined by A(0) = 83, A(n) = 10*A(n-1) - 7 for n > 0.at n=19A101062
- Numbers k such that 2*k-1, 4*k-1, 6*k-1 and 8*k-1 are primes.at n=12A124487
- Numbers k for which 2*k-1, 4*k-1, 8*k-1 and 16*k-1 are primes.at n=18A124494
- (n^3 - n + 15)/3.at n=33A155757
- Golden Triangle sums: a(n)=a(n-4)+A001654(n) with a(0)=0, a(1)=1, a(2)=2 and a(3)=6.at n=11A180666
- Potential magic constants of 7 X 7 magic squares composed of consecutive primes.at n=34A188536
- Deficient numbers n having a companion m > n such that sigma(n)/n = sigma(m)/m.at n=22A212608
- Numbers n that divide the sum of digits of 36^n.at n=38A220364
- Numbers such that Liouville's function (A002819) and the little omega analog to Liouville's function (A174863) are equal.at n=27A224987
- Numbers n such that n*2^2281 - 1 is prime.at n=8A265504
- Numbers that are sums of consecutive centered dodecahedral numbers (A005904).at n=40A329658
- Number of trees with n nodes and Z-domination number gamma_{Zg} = gamma_g.at n=12A339585
- Table read by descending antidiagonals: T(k,n) (k >= 0, n>= 1) is number of ways to (k+2)-color a 3 X n grid ignoring the variations of two colors.at n=17A355881
- Number of ways to 4-color a 3 X n grid ignoring the variations of two colors.at n=3A355882