Properties of the Number -128881

One Hundred Twenty-Eight Thousand Eight Hundred Eighty-One

Basics

Value: -128882 → -128881 → -128880

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 359 ²

Divisors: 1, 359, 128881

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111011101110001

Octal: -373561

Duodecimal: -62701

Hexadecimal: -1f771

Square: 16610312161

Square Root: 359

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) = (11·n + 7)². A17474

Composite numbers k such that the sum of the divisors of k² is a prime. A65405

Breadth-first reading of the subtree rooted at 7 of the tree where each parent node is the arithmetic derivative (A003415) of all its children. A327977

Squares that are the sum of 3 consecutive primes. A80665

Numbers k such that φ(k) == 2 (mod 12), where φ is the Euler totient function (A000010). A332511

Numbers k such that σ(k)*φ(k) is squarefree. A65299

a(n) = (10·n + 9)². A17378

Prime powers p^w (w >= 2) such that p^w-2 is prime. A53704

Squares composed of digits {1,2,8}. A53887

a(n) = A045873(n)². A94423