Properties of the Number -42286

Forty-Two Thousand Two Hundred Eighty-Six

Basics

Value: -42287 → -42286 → -42285

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 21143

Divisors: 1, 2, 21143, 42286

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1010010100101110

Octal: -122456

Duodecimal: -2057A

Hexadecimal: -a52e

Square: 1788105796

Square Root: 205.63560003073397

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

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero. A304310

Indices where A092243 strictly changes sign. A269737

G.f. A(x) satisfies: x·A(x) + x²*A(x)² = C(x)², where C(x) = x + C(x)² is a g.f. of the Catalan numbers (A000108). A273958

Number of n X 3 0..1 arrays with every element unequal to 0, 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero. A304305

a(n) = floor(exp(1/21) * n!). A30851

G.f.: (1-x)*(1-2·x-x²-(1-x)*sqrt(1-2·x-3·x²))/(2·x*(1-2·x-x²)). A257596

Numbers k such that (7·10^k - 13)/3 is prime. A273924