15472
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
- 10
- Divisor Sum
- 30008
- Proper Divisor Sum (Aliquot Sum)
- 14536
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7728
- Möbius Function
- 0
- Radical
- 1934
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 2
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
- 146
- 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
- Numbers k such that k!!! + 1 is prime (0 is included by convention).at n=34A037083
- Triangle read by rows: entries give numbers of permutations of [1..n] by absolute barycenter.at n=24A062867
- The 5-cycle of the n => sigma(n)-n process, where sigma(n) is the sum of divisors of n (A000203).at n=2A072891
- Number of positions that are exactly n moves from the starting position in the Hockey Puck puzzle.at n=7A079737
- Number of Fermat pseudoprimes to base 3 less than 10^n.at n=9A114245
- Number of isomers of polyhex hydrocarbons with C_(2h) symmetry with nineteen hexagons.at n=12A120386
- Conjectured list of sociable numbers.at n=5A122726
- Largest members of k-sociable cycles of order r.at n=13A183013
- Conjectured list of multisociable numbers.at n=24A183019
- Number of length n+5 0..3 arrays with every six consecutive terms having the maximum of some two terms equal to the minimum of the remaining four terms.at n=2A250076
- T(n,k)=Number of length n+5 0..k arrays with every six consecutive terms having the maximum of some two terms equal to the minimum of the remaining four terms.at n=12A250081
- Number of length 3+5 0..n arrays with every six consecutive terms having the maximum of some two terms equal to the minimum of the remaining four terms.at n=2A250084
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 179", based on the 5-celled von Neumann neighborhood.at n=27A270624
- a(n) = n^3/3 - 7*n/3 + 4.at n=36A270809
- Number of compositions (ordered partitions) of n into triangular parts (A000217) such that no two adjacent parts are equal (Carlitz compositions).at n=40A301502
- Conjectured list of numbers which are perfect, amicable, or sociable.at n=23A347770