6476
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 11340
- Proper Divisor Sum (Aliquot Sum)
- 4864
- 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
- 3236
- Möbius Function
- 0
- Radical
- 3238
- 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
- 49
- 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
- a(n) = 2^(2*n+1) - binomial(2*n+1, n+1).at n=6A000346
- Site percolation series for square lattice.at n=18A006731
- Chvatal conjecture for radius of graph of maximal intersecting sets.at n=14A007008
- a(n) = Sum_{k=0..6} binomial(n,k).at n=14A008859
- Coordination sequence for MgNi2, Position Ni2.at n=20A009932
- Numbers k such that the continued fraction for sqrt(k) has period 72.at n=18A020411
- a(n) = a(n-1) + a(n-2) + 1, with a(0) = 0, a(1) = 9.at n=15A022314
- Number of 9's in all partitions of n.at n=38A024793
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 40.at n=38A031538
- a(n) = 2^n - C(n,0) - C(n,1) - ... - C(n,7).at n=14A035040
- Number of partitions of n into parts 3k or 3k+1.at n=45A035360
- a(n) = 2^n - binomial(n, floor(n/2)).at n=13A045621
- Numbers m such that the factorizations of m..m+3 have the same number of primes (including multiplicities).at n=30A045940
- A triangle related to A000108 (Catalan) and A000302 (powers of 4).at n=29A046527
- Numbers n such that A005210(n) = 0.at n=8A051202
- Triangle T(n,k) giving number of rooted maps regardless of genus with n edges and k nodes (n >= 0, k = 1..n+1).at n=34A053979
- a(n) = 2^(n-1) - ((1+(-1)^n)/4)*binomial(n, n/2).at n=14A058622
- Least k such that k*12^n +/- 1 are twin primes.at n=43A064221
- Numbers m such that [A070080(m), A070081(m), A070082(m)] is a right integer triangle.at n=16A070136
- Number of general plane trees which are either empty (the case a(0)), or whose root degree is either 1 (i.e., the planted trees) or the two leftmost subtrees (of the root node) are identical.at n=10A073190