Properties of the Number 64621

Sixty-Four Thousand Six Hundred Twenty-One

Basics

Value: 64620 → 64621 → 64622

Parity: odd

Prime: Yes

Previous Prime: 64613

Next Prime: 64627

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 64621

Divisors: 1, 64621

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110001101101

Octal: 176155

Duodecimal: 31491

Hexadecimal: fc6d

Square: 4175873641

Square Root: 254.20660888340413

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

Primes equal to a hexagonal number plus 1. A285790

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 414", based on the 5-celled von Neumann neighborhood. A288052

Odd numbers k that divide A005941(k). A364549

Primes that remain prime through 4 iterations of function f(x) = 9x + 10. A23327

Numerators of continued fraction convergents to sqrt(862). A42664

Number of multisets that occurring as the peak heights multiset of a Dyck n-path that are the also the peak heights multiset of a smaller Dyck path. A208740

Primes of the form triangular(p) + 1, where p is a prime. A231988

Compound filter: a(n) = P(A055881(n), A278236(n)), where P(n,k) is sequence A000027 used as a pairing function. A286381

Compound filter: a(n) = P(A257993(n), A278226(n)), where P(n,k) is sequence A000027 used as a pairing function. A286382

a(n) is the least number k such that exactly fraction 1/n of the members of the reduced residue system mod k are prime, or 0 if there is no such k. A307711