Properties of the Number -1607521

Six Hundred Seven Thousand Five Hundred Twenty-One

Basics

Value: -1607522 → -1607521 → -1607520

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 103 × 15607

Divisors: 1, 103, 15607, 1607521

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110001000011101100001

Octal: -6103541

Duodecimal: -656341

Hexadecimal: -188761

Square: 2584123765441

Square Root: 1267.8805148751203

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) = -2·a(n-1) + a(n-2) for n>1, a(0)=1, a(1)=-1. A123335

Pell-Lucas numbers: numerators of continued fraction convergents to sqrt(2). A1333

NSW numbers: a(n) = 6·a(n-1) - a(n-2); also a(n)² - 2·b(n)² = -1 with b(n) = A001653(n+1). A2315

Expansion of (1+x)/(1-2·x-x²). A78057

Interleave denominators (A000129) and numerators (A001333) of convergents to sqrt(2). A2965

a(1) = 1, a(2) = 2; a(2·k) = 2·a(2·k-1) - a(2·k-2), a(2·k+1) = 4·a(2·k) - a(2·k-1). A84068

A005319 and A002315 interleaved. A143608

Expansion of (1+2·x-2·x³-3·x²)/((x-1)*(x+1)*(x²+2·x-1)). A100828

Primitive parts of Pell numbers. A8555

a(2n) = A002315(n), a(2n+1) = A082639(n+1). A113224