Properties of the Number 751

Seven Hundred Fifty-One

Basics

Value: 750 → 751 → 752

Parity: odd

Prime: Yes

Previous Prime: 743

Next Prime: 757

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 751

Divisors: 1, 751

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1011101111

Octal: 1357

Duodecimal: 527

Hexadecimal: 2ef

Square: 564001

Square Root: 27.40437921208944

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 of the form x² + xy + 2y², with·and y nonnegative. A106856

Numbers k such that (68·10^k + 7)/3 is prime. A270613

Emirps (primes whose reversal is a different prime). A6567

Primes of the form 10·n+1. A30430

Primes whose reversal in base 10 is also prime (called "palindromic primes" by David Wells, although that name usually refers to A002385). Also called reversible primes. A7500

Primes of the form 8n+7, that is, primes congruent to -1 mod 8. A7522

Numbers k such that (21^k - 2^k)/19 is prime. A375236

Irregular primes: primes p such that at least one of the numerators of the Bernoulli numbers B₂, B₄, ..., B_p-3 (A000367) is divisible by p. A928

Primes whose decimal representation is a valid number in base 9 and interpreted as such is again a prime. A235395

Primes followed by a gap of 6, i.e., next prime is p + 6. A31924