Properties of the Number 42057

Forty-Two Thousand Fifty-Seven

Basics

Value: 42056 → 42057 → 42058

Parity: odd

Prime: No

Previous Prime: 42043

Next Prime: 42061

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 4673

Divisors: 1, 3, 9, 4673, 14019, 42057

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010001001001

Octal: 122111

Duodecimal: 20409

Hexadecimal: a449

Square: 1768791249

Square Root: 205.0780339285512

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

Number of rucksack partitions of n: every consecutive constant subsequence has a different sum. A353864

Number of strings of n decimal digits that contain at least one string of exactly 2 consecutive "0" digits. A255372

Number of partitions of n such that (maximal multiplicity of parts) = (multiplicity of the least part). A240303

Expansion of e.g.f. exp(x + 2 * ∑_k>=1 x^{2^k}/2^k). A308392

Denominators of continued fraction convergents to sqrt(552). A42057

Number of strings of k+n decimal digits that contain one string of exactly k consecutive "0" digits, where k >= n. A255381