Properties of the Number -128765

One Hundred Twenty-Eight Thousand Seven Hundred Sixty-Five

Basics

Value: -128766 → -128765 → -128764

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 5 × 7 × 13 × 283

Divisors: 1, 5, 7, 13, 35, 65, 91, 283, 455, 1415

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -11111011011111101

Octal: -373375

Duodecimal: -62625

Hexadecimal: -1f6fd

Square: 16580425225

Square Root: 358.8384037418515

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

Number of connected (3,n)-hypergraphs (without empty edges and without multiple edges). A114932

a(n) = binomial(n,3) + 6·binomial(n,4) + 15·binomial(n,5) + 15·binomial(n,6). A382081

Triangle T(n,r), read by rows, where the r-th column is expansion of A(x)^r, with A(x) = x * (x+1) * (2·x⁴+4·x³-2·x+1) * (x⁴+2·x³-x+1) / (x²+x-1)⁶. A187055