Properties of the Number -128505

One Hundred Twenty-Eight Thousand Five Hundred Five

Basics

Value: -128506 → -128505 → -128504

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 13 × 659

Divisors: 1, 3, 5, 13, 15, 39, 65, 195, 659, 1977

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111010111111001

Octal: -372771

Duodecimal: -62449

Hexadecimal: -1f5f9

Square: 16513535025

Square Root: 358.4759406152664

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) = 3*(2·n - 1)*( 3*(2·n - 1)³ - 1) / 2 for n > 0. A355753

Partition the decimal expansion of π into non-overlapping strings of length 10: 3141592653, 5897932384,..; a(n) is the position of the strings where digits are different from each other. A329368