14805
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
- 24
- Divisor Sum
- 29952
- Proper Divisor Sum (Aliquot Sum)
- 15147
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 6624
- Möbius Function
- 0
- Radical
- 4935
- 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
- no
- 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
- no
- Odd
- yes
Appears in sequences
- Number of different score sequences that are possible in an n-team round-robin tournament.at n=12A000571
- Odd abundant numbers (odd numbers m whose sum of divisors exceeds 2m).at n=31A005231
- Odd primitive abundant numbers.at n=22A006038
- Fibonacci sequence beginning 0, 15.at n=16A022349
- a(n) = n * Fibonacci(n+1).at n=15A023607
- Number of binary [ n,7 ] codes of dimension <= 7 without zero columns.at n=11A034341
- Numbers whose base-11 representation has exactly 5 runs.at n=29A043648
- Mean divisor of n differs by <= 1 from mean divisor of all numbers from 1 to n-1.at n=21A049010
- Write 1, 2, 3, 4, ... counterclockwise in a hexagonal spiral around 0 starting left down, then a(n) is the sequence found by reading from 0 in the vertical upward direction.at n=35A063436
- Odd primitive numbers such that n! divided by product of factorials of all proper divisors of n is not an integer.at n=18A075460
- Matrix product of unsigned Lah-triangle |A008297(n,k)| and unsigned Stirling1-triangle |A008275(n,k)|.at n=24A079638
- Numbers of rooted hypermaps on the torus with n darts (darts are semi-edges in the particular case of ordinary maps).at n=4A118093
- Exponential Riordan array [1, log((1-x)/(1-2x))].at n=32A131222
- Triangle of numbers obtained from the partition array A134145.at n=22A134146
- a(n) = 2*n^3 - 3*n^2 + 5.at n=20A152064
- Odd almost practical numbers.at n=27A174535
- Odd abundant numbers whose abundance is even.at n=30A174865
- Denominator of a-sequence for Sheffer triangle A060081.at n=46A176727
- Triangle T(n,k), read by rows, given by (0, 1, 2, 2, 4, 3, 6, 4, 8, 5, 10, ...) DELTA (1, 0, 1, 0, 1, 0, 1, 0, ...) where DELTA is the operator defined in A084938.at n=40A184962
- Irregular triangle of odd primitive abundant numbers (A006038) in which row n has numbers with n distinct prime factors.at n=26A188439