Properties of the Number -205661

Two Hundred Five Thousand Six Hundred Sixty-One

Basics

Value: -205662 → -205661 → -205660

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 205661

Divisors: 1, 205661

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110010001101011101

Octal: -621535

Duodecimal: -9B025

Hexadecimal: -3235d

Square: 42296446921

Square Root: 453.49862182811535

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

Minimal exponents m such that the fractional part of (1024/1000)^m obtains a minimum (when starting with m=1). A153677

a(n) = ∑_{k=0..floor(n/5)} (-1)^k * (n-4·k)!/(n-5·k)!. A358606