Properties of the Number 64261

Sixty-Four Thousand Two Hundred Sixty-One

Basics

Value: 64260 → 64261 → 64262

Parity: odd

Prime: No

Previous Prime: 64237

Next Prime: 64271

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 179 × 359

Divisors: 1, 179, 359, 64261

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111101100000101

Octal: 175405

Duodecimal: 31231

Hexadecimal: fb05

Square: 4129476121

Square Root: 253.4975345047758

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

Triangular numbers which are the product of two primes. A68443

Primitive numbers in A229307. A229311

Product p·q of two primes with q = 2·p + 1. A156592

The first of three consecutive triangular numbers the sum of which is equal to the sum of three consecutive primes. A298168

Number of Dyck n-paths all of whose ascents and descents have lengths equal to 1 (mod 5). A212364

a(n) = 2ⁿ*∑_k=0..n (n+k)!/((n-k)!*k!*4^k). A43301

Number of Motzkin paths of length n with no peaks at level 1. A89372

Triangular numbers (A000217) that are also centered heptagonal numbers (A069099). A253880

Squarefree numbers (from A005117) with prime divisors in a 2p+1 progression. A231966

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 451", based on the 5-celled von Neumann neighborhood. A288363