12674
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
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 19014
- Proper Divisor Sum (Aliquot Sum)
- 6340
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6336
- Möbius Function
- 1
- Radical
- 12674
- Omega Function (Ω)
- 2
- 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
- 55
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- 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
- a(n) = C(n+2,3) + C(n,3) + C(n-1,3).at n=29A006004
- a(0) = 1, a(n) = 22*n^2 + 2 for n>0.at n=24A010012
- Positive numbers k such that k and 5*k are anagrams in base 9 (written in base 9).at n=5A023082
- Numerators of continued fraction convergents to sqrt(406).at n=5A041770
- Sum of a(n) terms of 1/k^(3/4) first exceeds n.at n=39A056179
- Numbers k such that prime(k) + prime(k+1)*2 is a square.at n=25A064504
- Denominator of (prime(n)+1)*(prime(n+1)+1)/(4*(prime(n)*prime(n+1)+1)).at n=43A079082
- a(n) = n^3 - 2*n^2 + 2.at n=23A100109
- Antidiagonal sums in A101321.at n=23A101338
- Number of triples (a, b, c) with gcd(a, b, c) = 1 and -n <= a,b,c <= n.at n=12A175549
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 161", based on the 5-celled von Neumann neighborhood.at n=27A270452
- Sum of the prime parts in the partitions of n into 5 parts.at n=38A309466
- Transpose of square array A328464.at n=70A328463
- Square array A(n,k) = A276156((2^(n-1)) * (2k-1)) / A002110(n-1), read by descending antidiagonals.at n=73A328464
- Triangle read by rows: T(n,k) = (A002110(n) + A002110(k)) / A002110(k), 1 <= k <= n.at n=51A370135
- Number of free hexagonal polyominoes with n cells with at most 3 collinear cell centers on any line in the plane.at n=12A377756