15340
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 35280
- Proper Divisor Sum (Aliquot Sum)
- 19940
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5568
- Möbius Function
- 0
- Radical
- 7670
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 133
- 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
- Coordination sequence for alpha-Mn, Position Mn4.at n=32A009953
- Occurrences of most frequently occurring number in 1-to-n 5-dimensional multiplication table.at n=26A057344
- Numbers k such that the number of primes <= k is phi(phi(k)).at n=22A063999
- Euler transform of 1, 1, 3, 8, 23, ... (A050535).at n=9A076866
- Row sums of triangle A091604.at n=21A091610
- a(n) = 529*n - 1.at n=28A158365
- Number of n X 6 0..2 arrays with rows nondecreasing and antidiagonals unimodal.at n=2A224010
- T(n,k)=Number of nXk 0..2 arrays with rows nondecreasing and antidiagonals unimodal.at n=30A224012
- Number of 3 X n 0..2 arrays with rows nondecreasing and antidiagonals unimodal.at n=5A224013
- Number of n X 2 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4.at n=23A239844
- Row 4 of array in A265080.at n=10A265081
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 326", based on the 5-celled von Neumann neighborhood.at n=41A271261
- Number of partitions of n whose least part is a multiple of 4.at n=65A363095
- Index where n first appears in A381658.at n=51A381659