Properties of the Number -128981

One Hundred Twenty-Eight Thousand Nine Hundred Eighty-One

Basics

Value: -128982 → -128981 → -128980

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 128981

Divisors: 1, 128981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11111011111010101

Octal: -373725

Duodecimal: -62785

Hexadecimal: -1f7d5

Square: 16636098361

Square Root: 359.1392487601432

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

Primes p such that the polynomial x² + x + p generates only primes for x = 0, ..., 4. A187057

Primes p such that the polynomial x² + x + p generates only primes for x = 1..7. A187060

Primes p such that the polynomial x² + x + p generates only primes for x = 1..6. A144051

Initial primes of 5 consecutive primes with consecutive gaps 2, 4, 6, 8. A190814

Initial primes of 6 consecutive primes with consecutive gaps 2,4,6,8,10. A190817

Initial primes of 7 consecutive primes with consecutive gaps 2, 4, 6, 8, 10, 12. A190819

Initial primes of 8 consecutive primes with 7 consecutive gaps 2, 4, 6, 8, 10, 12, 14. A190838

Primes p such that the polynomial x² + x + p generates only primes for x = 1..5. A187058

First primes followed by sequences of exactly n monotonic increasing prime gaps. A158939

a(n) is the smallest prime p(k) such that the gaps between the primes p(k), p(k+1), p(k+2), ..., p(k+n) are 2, 4, 6, ... 2n. A16045