Properties of the Number -1587

Five Hundred Eighty-Seven

Basics

Value: -1588 → -1587 → -1586

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 23 ²

Divisors: 1, 3, 23, 69, 529, 1587

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11000110011

Octal: -3063

Duodecimal: -B03

Hexadecimal: -633

Square: 2518569

Square Root: 39.83716857408418

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) = ∑_d∣n (-1)^d-1 * binomial(d+n/d-1, d). A338682

a(1) = 1, a(2) = 3; a(n) = n² * ∑_{d∣n, d < n} (-1)^n/d a(d) / d². A361986

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 435", based on the 5-celled von Neumann neighborhood. A272152

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 469", based on the 5-celled von Neumann neighborhood. A272419

Coefficients of modular function denoted G₆(τ) by Atkin. A5764

Expansion of (1-x)^-1/(1-x²+2·x³). A77884

a(n) = 3·n². A33428

Positive integers which apparently never result in a palindrome under repeated applications of the function A056964(x) = x + (x with digits reversed). A23108

"Three-quarter squares": a(n) = n² - A002620(n). A77043

Numbers that are the sum of 5 positive 6th powers. A3361