8246
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 15360
- Proper Divisor Sum (Aliquot Sum)
- 7114
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 3240
- Möbius Function
- 1
- Radical
- 8246
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- 96
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Weighted count of partitions with odd parts.at n=41A005896
- Generalized Fibonacci numbers A_{n,2}.at n=29A006207
- Numbers whose base-6 representation is the juxtaposition of two identical strings.at n=37A020334
- a(n) = n*(21*n + 1)/2.at n=28A022279
- Base-6 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,2.at n=5A037499
- Number of nonprimes <= prime(n)^2.at n=24A053683
- Number of polyarcs with n cells.at n=6A057787
- Partial sums of A026905; the convolution of the natural numbers with the partition function.at n=18A085360
- a(n)=A089551(n)/2.at n=43A089558
- Number of those nonnegative integer solutions of the congruence x_1+2x_2+...+(n-1)x_{n-1} = 0 (mod n) which are indecomposable, that is, are not nonnegative linear combinations of other nonnegative integer solutions.at n=19A096337
- Number of 3 X n 0-1 matrices avoiding simultaneously the right angled numbered polyomino patterns (ranpp) (00;1), (01;0), (10;0) and (01;1).at n=13A100315
- Square array, read by antidiagonals, where rows are successive self-convolutions of the top row, which equals A003169 shifted one place right.at n=34A100324
- Number of permutations of length n which avoid the patterns 1234, 1432, 4231.at n=11A116804
- a(n) is the floor of the first component of M^n * (0, 1, 2, 3) where M is the matrix [[c, 1/2, 1/2, 1/2], [1/2, c, 1/2, 1/2], [1/2, 1/2, c, 1/2], [1/2, 1/2, 1/2, c]] and c=sqrt(3)/2.at n=10A121811
- 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, -1), (1, 0, 1), (1, 1, -1)}.at n=8A149206
- a(n) = 686*n + 14.at n=11A157366
- The even composites c such that c=q*g*j*y and q+g=j*y where q,g,j,y are primes.at n=23A167690
- Number of disconnected regular simple graphs on n vertices with girth at least 6.at n=38A185216
- Inverse permutation to A190130.at n=4A190131
- a(n) = lcm((d1 + 1), (d2 + 1), ..., (dk + 1)), where d1, d2, ..., dk are the prime factors of the n-th Fermat pseudoprime to base 2, A001567(n).at n=39A216404