Properties of the Number 442

Four Hundred Forty-Two

Basics

Value: 441 → 442 → 443

Parity: even

Prime: No

Previous Prime: 439

Next Prime: 443

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 × 13 × 17

Divisors: 1, 2, 13, 17, 26, 34, 221, 442

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111010

Octal: 672

Duodecimal: 30A

Hexadecimal: 1ba

Square: 195364

Square Root: 21.02379604162864

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) = n² + 1. A2522

Generalized pentagonal numbers: m*(3·m - 1)/2, m = 0, +-1, +-2, +-3, .... A1318

Second pentagonal numbers: a(n) = n*(3·n + 1)/2. A5449

Number of partitions of n into pairwise relatively prime parts. A51424

Generalized heptagonal numbers: m*(5·m - 3)/2, m = 0, +-1, +-2 +-3, ... A85787

Number of compositions of n with distinct differences. A325545

Expansion of g.f. x/((1 - x)²*(1 - x³)). A1840

Infinite sequence starting with a(0)=0 such that A049820(a(k)) = a(k-1) for all k>=1, where A049820(n) = n - (number of divisors of n). A259934

Quarter-squares plus 1 (that is, a(n) = A002620(n) + 1). A33638

Numbers whose sum of digits is 10. A52224