Properties of the Number -127681

One Hundred Twenty-Seven Thousand Six Hundred Eighty-One

Basics

Value: -127682 → -127681 → -127680

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 127681

Divisors: 1, 127681

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111001011000001

Octal: -371301

Duodecimal: -61A81

Hexadecimal: -1f2c1

Square: 16302437761

Square Root: 357.32478223599327

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

Sums of the form (twin primes + 1) which are also an upper twin prime. A158870

a(n) = 1 + 12·n + 81·n³ + n*(105·n + 81·n³)/2. A134163

Primes of the form 20·k² + 36·k + 17. A154419

Expansion of e.g.f. ∑_k>=1 x^k / (k! * (1 - x^k)^k). A330020