Properties of the Number -102856

One Hundred Two Thousand Eight Hundred Fifty-Six

Basics

Value: -102857 → -102856 → -102855

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ³ × 13 × 23 × 43

Divisors: 1, 2, 4, 8, 13, 23, 26, 43, 46, 52

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11001000111001000

Octal: -310710

Duodecimal: -4B634

Hexadecimal: -191c8

Square: 10579356736

Square Root: 320.7117085483472

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

Numbers k such that σ(k) = ψ(k) + φ(k). A389478

Numbers n such that σ(n) = 5*φ(n). A136547

G.f. A(x) satisfies: A(x) = x + 2·B(x)*C(x), where B(x) = x + 3·A(x)*C(x) and C(x) = x + 5·A(x)*B(x). A229808

a(n) = number of subsets S of {1,2,...,n} having more than 2 elements such that (sum of least three elements of S) < max(S). A357285

Numbers k such that φ(k) = σ(core(k)) where φ(k) is the Euler totient function, σ(k) the sum of divisors of k and core(k) the squarefree part of k (the smallest integer such that k·core(k) is a square). A69552

Number of permutations that end with a consecutive pattern 123, and avoid consecutive patterns 123 and 213 elsewhere. A371943