16579
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 28
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 16920
- Proper Divisor Sum (Aliquot Sum)
- 341
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 16240
- Möbius Function
- 1
- Radical
- 16579
- Omega Function (Ω)
- 2
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 115
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- 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
- Quotients arising from sequence A053312.at n=6A126933
- Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0100-0111 pattern in any orientation.at n=10A146438
- a(n) = (A216363(n) - 1)/118.at n=35A216380
- Number of length-n 0..6 arrays with no repeated value differing from the previous repeated value by one.at n=4A269492
- T(n,k)=Number of length-n 0..k arrays with no repeated value differing from the previous repeated value by one.at n=49A269494
- Number of length-5 0..n arrays with no repeated value differing from the previous repeated value by one.at n=5A269496
- Number of unlabeled, non-connected or empty antichains of nonempty subsets of {1..n}.at n=7A327424
- a(n) is the least number which is coprime to its digital sum (A339076) with a gap n to the next term of A339076, or 0 if such a number does not exist.at n=9A339078
- Fold a square sheet of paper alternately vertically to the left and horizontally downwards; after each fold, draw a line along each inward crease; after n folds, the resulting graph has a(n) edges.at n=14A342761
- Numbers that are the sum of five fourth powers in three or more ways.at n=13A344243
- Numbers that are the sum of five fourth powers in exactly three ways.at n=13A344244
- Number of subsets of Z_n such that every ordered pair of distinct elements has a different difference.at n=27A382399