Properties of the Number -261991

Two Hundred Sixty-One Thousand Nine Hundred Ninety-One

Basics

Value: -261992 → -261991 → -261990

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 19 × 13789

Divisors: 1, 19, 13789, 261991

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111111111101100111

Octal: -777547

Duodecimal: -107747

Hexadecimal: -3ff67

Square: 68639284081

Square Root: 511.8505641298054

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) = 2ⁿ - n*(n-1)/2. A14844

Leading diagonal of triangle in A080521. A80522