Properties of the Number 1251

One Thousand Two Hundred Fifty-One

Basics

Value: 1250 → 1251 → 1252

Parity: odd

Prime: No

Previous Prime: 1249

Next Prime: 1259

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 139

Divisors: 1, 3, 9, 139, 417, 1251

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011100011

Octal: 2343

Duodecimal: 883

Hexadecimal: 4e3

Square: 1565001

Square Root: 35.369478367654786

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

Apéry numbers: a(n) = ∑_k=0..n binomial(n,k)² * binomial(n+k,k). A5258

Expansion of ∏_k>=1 1/(1 - A000009(k)*x^k). A270995

a(n) = 2·n² + 1. A58331

Square array, read by antidiagonals, where row n equals the crystal ball sequence for the A_n lattice. A108625

Numbers which are the sum of 3 nonzero 4th powers. A3337

Generalized 30-gonal (or triacontagonal) numbers: m*(14·m - 13) with m = 0, +1, -1, +2, -2, +3, -3, ... A316729

Coordination sequence for (2,3,7) tiling of hyperbolic plane. A265057

Number of subsets of {1..n} with all distinct lengths of maximal anti-runs (increasing by more than 1). A384177

Mountain numbers. A134941

Number of 4's in the last section of the set of partitions of n. A182714