16675
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 22320
- Proper Divisor Sum (Aliquot Sum)
- 5645
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 12320
- Möbius Function
- 0
- Radical
- 3335
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 159
- 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
- Hexagonal pyramidal numbers, or greengrocer's numbers.at n=29A002412
- Number of ways in which n identical balls can be distributed among 5 boxes in a row such that each pair of adjacent boxes contains at least 4 balls.at n=18A005338
- Odd hexagonal pyramidal numbers.at n=14A015225
- Expansion of 1/(1-x^5-x^6-x^7-x^8-x^9-x^10-x^11-x^12-x^13-x^14).at n=43A017845
- Triangle read by rows: T(n, k) = A084029(n, k)/n.at n=17A084033
- Indices of primes in sequence defined by A(0) = 63, A(n) = 10*A(n-1) + 23 for n > 0.at n=22A101532
- Numbers k such that sigma(k) - phi(k) is a 4th power.at n=20A115918
- Beastly fax numbers: numbers containing the fax number of the Beast (667, one more than its regular number) in their decimal expansion.at n=32A138563
- T(n,k) = number of n X k binary matrices with rows and columns each in strictly increasing order as binary numbers and each row and column having an even number of 1's.at n=83A181004
- T(n,k) = number of n X k binary matrices with rows and columns each in strictly increasing order as binary numbers and each row and column having an even number of 1's.at n=85A181004
- Number of (n+2)xn binary matrices with rows and columns each in strictly increasing order as binary numbers and each row and column having an even number of 1s.at n=5A181006
- Numbers k such that 3^k + 16 is prime.at n=31A205647
- S_7 sequence in partition of integers > 1 described in A240521.at n=11A240524
- Numbers that are the sum of six fourth powers in four or more ways.at n=21A345561
- Numbers that are the sum of six fourth powers in exactly four ways.at n=19A345816
- Numbers N such that N + the sum of the cubes of its digits is again a third power.at n=19A362953
- Starts of runs of 3 consecutive integers whose exponent of least prime factor in their prime factorization is even.at n=30A365871
- Primitive terms of A389634.at n=32A389635