Properties of the Number 68461

Sixty-Eight Thousand Four Hundred Sixty-One

Basics

Value: 68460 → 68461 → 68462

Parity: odd

Prime: No

Previous Prime: 68449

Next Prime: 68473

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 223 × 307

Divisors: 1, 223, 307, 68461

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000101101101101

Octal: 205555

Duodecimal: 33751

Hexadecimal: 10b6d

Square: 4686908521

Square Root: 261.65053028801606

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

a(n) = ∑_{k=0..floor(n/2)} binomial(n-k,k)^n-2k*+1 * n/(n-k). A181081

a(n) = smallest index m such that smallest prime factor of m-th triangular number is prime(n). A226442

Factorial, or factoradic, expansion of log(11) = ∑_n>=1 a(n)/n!, with a(n) as large as possible. A68461