11425
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
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 14198
- Proper Divisor Sum (Aliquot Sum)
- 2773
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 9120
- Möbius Function
- 0
- Radical
- 2285
- Omega Function (Ω)
- 3
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 81
- 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
- Absolute values of coefficients of an elliptic function.at n=7A001941
- Numbers k such that x^k + x + 1 is irreducible over GF(2).at n=29A002475
- a(n) = C(n+2,3) + C(n,3) + C(n-1,3).at n=28A006004
- Strong pseudoprimes to base 18.at n=13A020244
- Numbers k such that the continued fraction for sqrt(k) has period 61.at n=11A020400
- T(2n,n+1), T given by A026780.at n=6A026894
- Positive numbers having the same set of digits in base 6 and base 10.at n=30A037437
- Positive numbers having the same set of digits in base 7 and base 10.at n=30A037440
- Denominators of continued fraction convergents to sqrt(22).at n=10A041035
- Number of primes <= the n-th Fibonacci number.at n=26A054782
- Number of symmetric types of (3,2n)-hypergraphs under action of complementing group C(3,2).at n=32A055780
- a(n) = Sum_{i=1..n} i^(n - i) + (i - n)^i.at n=9A062811
- a(n) = Sum_{i=1..n} i^(n - i) + (-1)^(n - i)*(n - i)^i.at n=9A062812
- Numbers whose base-10 and base-7 representations are permutations of the same multiset of digits.at n=21A130604
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (-1, 1, 0), (0, 0, -1), (1, 1, 1)}.at n=8A149576
- Triangle T(n, k) = 1 + abs(n! - k!)*abs(n! - (n-k)!), read by rows.at n=16A172177
- Triangle T(n, k) = 1 + abs(n! - k!)*abs(n! - (n-k)!), read by rows.at n=19A172177
- Partial sums of A007694.at n=36A174030
- Number of primes < Fibonacci(n).at n=26A182564
- Triangle of coefficients of polynomials v(n,x) jointly generated with A210563; see the Formula section.at n=52A210564