Properties of the Number 42287

Forty-Two Thousand Two Hundred Eighty-Seven

Basics

Value: 42286 → 42287 → 42288

Parity: odd

Prime: No

Previous Prime: 42283

Next Prime: 42293

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 7 ² × 863

Divisors: 1, 7, 49, 863, 6041, 42287

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1010010100101111

Octal: 122457

Duodecimal: 2057B

Hexadecimal: a52f

Square: 1788190369

Square Root: 205.63803150195733

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) = floor(C(n,6)/7). A11797

a(n) = (1/(4·n)) * ∑_d∣n μ(n/d) * binomial(4·d,d). A346578

Fermat coefficients. A972

T(n,7), array T as in A051168; a count of Lyndon words; aperiodic necklaces with 7 black beads and n-7 white beads. A51172

Number of binary strings of length n that contain the substring 1000. A373046

Second-order reciprocal Stirling number (Fekete) a(n) = [[2n+3, n]]. The number of n-orbit permutations of a (2n+3)-set with at least 2 elements in each orbit. Also known as associated Stirling numbers of the first kind (e.g., Comtet). A1784

Denominators of continued fraction convergents to sqrt(669). A42287