Properties of the Number -139805

One Hundred Thirty-Nine Thousand Eight Hundred Five

Basics

Value: -139806 → -139805 → -139804

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 5 × 27961

Divisors: 1, 5, 27961, 139805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4938 Try Today's Challenge

Representations

Binary: -100010001000011101

Octal: -421035

Duodecimal: -68AA5

Hexadecimal: -2221d

Square: 19545438025

Square Root: 373.90506816570434

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·n*(1 + n + n² + n³) - 3. A155121

a(n) = ∑_k=0..n 2^n-k * floor(k/4). A368346