Properties of the Number 42861

Forty-Two Thousand Eight Hundred Sixty-One

Basics

Value: 42860 → 42861 → 42862

Parity: odd

Prime: No

Previous Prime: 42859

Next Prime: 42863

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 7 × 13 × 157

Divisors: 1, 3, 7, 13, 21, 39, 91, 157, 273, 471

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011101101101

Octal: 123555

Duodecimal: 20979

Hexadecimal: a76d

Square: 1837065321

Square Root: 207.0289834781594

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 m such that there are precisely 19 groups of order m. A298910

Expansion of 1/((1-x)*(1-5·x)*(1-7·x)*(1-9·x)). A22453

a(n) = ∑_k=1..n sigma₂( n/gcd(k,n) ). A372226

Denominators of continued fraction convergents to sqrt(962). A42861

G.f. A(x) satisfies A(x) = 1/A(-x·A(x)) such that [x^2·n+1] A(x)ⁿ = 0 for n >= 0, with A(0) = A'(0) = 1. A377251