15324
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 35784
- Proper Divisor Sum (Aliquot Sum)
- 20460
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5104
- Möbius Function
- 0
- Radical
- 7662
- 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
- 177
- 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
- Interprimes which are of the form s*prime, s=12.at n=36A075287
- Number of partitions of 2n free of multiples of 8 such that 4 occurs at most once. All odd parts occur with even multiplicities. There is no restriction on the other even parts.at n=26A100684
- a(n) = (2*n^3 + 5*n^2 + 5*n)/2.at n=23A162267
- Permutations of 12345: Numbers having each of the decimal digits 1,...,5 exactly once, and no other digit.at n=20A178475
- Number of perfect rhythmic tilings of [0,3n-1] with triples.at n=12A261516
- Number of length-n 0..6 arrays with no repeated value differing from the previous repeated value by other than one.at n=4A269535
- T(n,k)=Number of length-n 0..k arrays with no repeated value differing from the previous repeated value by other than one.at n=49A269537
- Number of length-5 0..n arrays with no repeated value differing from the previous repeated value by other than one.at n=5A269539
- Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 222", based on the 5-celled von Neumann neighborhood.at n=13A279986
- T(n,k) = number of linear arrays of n 1's, n -1's, and k 0's such that no two adjacent elements are equal.at n=60A283613
- Decimal encoding T(n,k) of the k-th non-averaging permutation of [n]; triangle T(n,k), n >= 0, k = 1..A003407(n), read by rows.at n=18A292523
- Decimal representation of permutations of lengths 1, 2, 3, ...at n=35A306428
- a(n) is the nearest integer to the area of a triangle with sides prime(n), prime(n+1), prime(n+2).at n=41A338267
- a(n) = 1 + Sum_{k=1..n-5} a(k) * a(n-k-5).at n=31A346077
- Irregular table read by rows: T(n,k) is the number of k-gons, k>=2, among all distinct circles that can be constructed from an n x n square grid of points when each pair of points is connected by a circle and the points lie at the ends of a diameter of the circle.at n=20A360354