12875
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 16224
- Proper Divisor Sum (Aliquot Sum)
- 3349
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10200
- Möbius Function
- 0
- Radical
- 515
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 76
- 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
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 13 ones.at n=20A031781
- Numerators of continued fraction convergents to sqrt(32).at n=10A041052
- Numerators of continued fraction convergents to sqrt(128).at n=4A041232
- Numerators of continued fraction convergents to sqrt(512).at n=6A041978
- Base 8 palindromes that start with 3.at n=27A043023
- Generalized Pellian with second term equal to 5.at n=10A048655
- Expansion of (1+5*x)/(1-6*x+x^2).at n=5A054490
- Numbers k such that 2*k^2 + 14 is a square.at n=10A077446
- Sum of n-th antidiagonal of array in A082002.at n=23A082005
- Shifted Pell recurrence: a(n) = 2*a(n-2) + a(n-4).at n=20A135246
- A144325(n) + A144313(n) + A144315(n).at n=27A144715
- 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, -1, 1), (0, 0, -1), (0, 1, 0), (1, 1, 0)}.at n=8A150084
- Self-convolution of A180711.at n=32A180712
- a(n) = 2^(prime(n)-1) mod prime(n)^2.at n=36A196202
- a(n) = 2*a(n - 2) + a(n - 4) with a(0) = -1, a(1) = 1, a(2) = 3, a(3) = 5.at n=21A266505
- a(n) = 2*a(n-4) + a(n-8) for n >= 8.at n=43A266506
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 179", based on the 5-celled von Neumann neighborhood.at n=26A270624
- a(n) = 2*A090495(n) - 1.at n=24A274297
- Number of n X 3 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.at n=5A278358
- Number of nX6 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.at n=2A278361