16011
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 9
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 23760
- Proper Divisor Sum (Aliquot Sum)
- 7749
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10656
- Möbius Function
- 0
- Radical
- 1779
- Omega Function (Ω)
- 4
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 45
- 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 (3412,1234)-avoiding involutions in S_n.at n=29A085583
- Negative numbers written in a bits-of-Pi/primorial base system.at n=32A109839
- Numbers k for which digitsum(k) + digitsum(k^2) + digitsum(k^3) = digitsum(k^4).at n=36A118470
- Numbers such that the digital sum base 2 and the digital sum base 3 and the digital sum base 10 all are equal.at n=19A135120
- Row 4 of table A162424.at n=24A162427
- Number of multisets occurring as the peak heights multiset of a Dyck n-path.at n=14A208738
- Numbers k such that A307437(k) is divisible by 3.at n=26A342037
- Indices k such that A358128(k) is a square.at n=41A358130
- Number of powerful numbers that are not powers of primes (i.e. are in A286708) that do not exceed 2^n.at n=26A380431
- Numbers k such that sigma(k) = psi(k) + tau(k)^3 + pi(k).at n=3A390948