12548
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 21966
- Proper Divisor Sum (Aliquot Sum)
- 9418
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6272
- Möbius Function
- 0
- Radical
- 6274
- 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
- 37
- 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 k such that the least term in the periodic part of the continued fraction for sqrt(k) is 56.at n=3A031734
- Number of primitive (period n) periodic palindromic structures using a maximum of six different symbols.at n=16A056517
- Numbers n such that n^1024 + 1 is prime (a generalized Fermat prime).at n=16A057002
- Members of 3-cycles of permutation A111273.at n=10A113701
- Alkane systems (see Cyvin reference for precise definition).at n=12A121186
- 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, -1), (-1, -1, 1), (-1, 0, 1), (1, 0, 0), (1, 1, -1)}.at n=10A148139
- 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, 1), (-1, 1, 0), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.at n=7A150837
- Convolution sequence, A000027 / A008683.at n=15A152902
- a(n) = 16*n^2 + 4.at n=27A158444
- Number of n-leaf binary trees that do not contain (()(()(((()())())()))) as a subtree.at n=10A159770
- Nonsquares in A277699 listed in the order of their appearance.at n=43A277805
- Number of permutations of [n] avoiding {1324, 2143, 3412}.at n=10A294702
- Integers k such that 2^k contains all powers of 2 not exceeding k as substrings.at n=39A372680