Properties of the Number 64675

Sixty-Four Thousand Six Hundred Seventy-Five

Basics

Value: 64674 → 64675 → 64676

Parity: odd

Prime: No

Previous Prime: 64667

Next Prime: 64679

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 5 ² × 13 × 199

Divisors: 1, 5, 13, 25, 65, 199, 325, 995, 2587, 4975

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110010100011

Octal: 176243

Duodecimal: 31517

Hexadecimal: fca3

Square: 4182855625

Square Root: 254.3127995205904

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 11. A154084

a(n) = ∑_k=0..n ((2k+1)*C(n,k)*C(n+k,k))², where C(n,k) denotes the binomial coefficient n!/(k!*(n-k)!). A246461

Numbers k such that sopfr(k) = sopf(k+1), where sopf(k) = A008472(k) and sopfr(k) = A001414(k). A64675