Properties of the Number -1251

Two Hundred Fifty-One

Basics

Value: -1252 → -1251 → -1250

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

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

a(n) = 3·a(n-2) - a(n-3) with a(0)=0, a(1)=3, a(2)=0. A214699

Expansion of sqrt(1-4x)/(1-x). A106191

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 213", based on the 5-celled von Neumann neighborhood. A270904

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 249", based on the 5-celled von Neumann neighborhood. A271015

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 417", based on the 5-celled von Neumann neighborhood. A272019

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 441", based on the 5-celled von Neumann neighborhood. A272224

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 457", based on the 5-celled von Neumann neighborhood. A272283

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