16132
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 29260
- Proper Divisor Sum (Aliquot Sum)
- 13128
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7776
- Möbius Function
- 0
- Radical
- 8066
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 71
- 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 n such that 57*2^n-1 is prime.at n=26A050554
- Numbers n such that n | sigma_12(n).at n=22A055716
- First minimum value > 0 of the form x^3-k^2 when k > n^3.at n=24A070959
- Number of isolated-pentagon fullerenes with 2n vertices (or carbon atoms).at n=29A086423
- a(n) = A014486(A122234(n)).at n=4A122235
- Number of numerical semigroups with Frobenius number n; that is, numerical semigroups for which the largest integer not belonging to them is n.at n=26A124506
- a(n) = 3*a(n-1) + 4*a(n-2) - a(n-3) + 3*a(n-4) + 4*a(n-5).at n=10A135450
- 4 times octagonal numbers: a(n) = 4*n*(3*n-2).at n=37A153794
- Numbers n such that (2^(n+7)*5^(n+6)-1024877)/9 is prime (n > 0).at n=13A266963
- Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 41", based on the 5-celled von Neumann neighborhood.at n=13A278423
- Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 329", based on the 5-celled von Neumann neighborhood.at n=13A281174
- Numbers k such that (10^k)/2 - 1 is prime.at n=15A295988
- Number of 4-element subsets of [n] having a prime element sum.at n=34A320679
- Numbers k such that phi(k) and phi(k+1) are perfect powers (A001597).at n=37A332008
- a(n) is the largest integer x such that x/sopf(x) = prime(n) where sopf(x) is the sum of distinct prime factors of x and prime(n) is the n-th prime.at n=28A336493
- Gaston Tarry's 1905 trimagic square of order 128, read by rows.at n=0A381002