Properties of the Number -645376

Six Hundred Forty-Five Thousand Three Hundred Seventy-Six

Basics

Value: -645377 → -645376 → -645375

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 ⁸ × 2521

Divisors: 1, 2, 4, 8, 16, 32, 64, 128, 256, 2521

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10011101100100000000

Octal: -2354400

Duodecimal: -271594

Hexadecimal: -9d900

Square: 416510181376

Square Root: 803.3529734805243

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(0) = a(1) = 1; a(n+2) = 2·a(n+1) + 2·a(n). A26150

a(n) = 8·a(n-1) - 4·a(n-2), where a(0) = 1, a(1) = 4. A90965

a(n)*a(n+3) - a(n+1)*a(n+2) = 2ⁿ, given a(0) = 1, a(1) = 1, and a(2) = 1. A80876

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of (1-(k+1)*x) / (1-2*(k+1)*x+((k-1)*x)²). A333988

Expansion of g.f.: x²*(1 + x - x²)/(1 - 2·x² - 2·x⁴). A160444

Expansion of e.g.f. arcsin(arctan(x) * exp(x)). A12410

Elements of A160444, pairs of consecutive entries swapped. A160572