Properties of the Number 42243

Forty-Two Thousand Two Hundred Forty-Three

Basics

Value: 42242 → 42243 → 42244

Parity: odd

Prime: No

Previous Prime: 42239

Next Prime: 42257

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 14081

Divisors: 1, 3, 14081, 42243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010100000011

Octal: 122403

Duodecimal: 20543

Hexadecimal: a503

Square: 1784471049

Square Root: 205.53101955665963

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) = 9ⁿ - 7ⁿ + 1. A155660

Number of ordered 9-tuples of distinct pairwise coprime positive integers with largest element n. A186980

Number of series-reduced rooted trees whose leaves are strict integer partitions whose multiset union is a strict integer partition of n. A320176

Number of 8-element subsets of {1, 2, ..., n} having pairwise coprime elements. A186984

Constant term of the reduction by x²->x+1 of the polynomial p(n,x) defined at Comments. A193008

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + 2·b(n-2), where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4. A294418

Semiprimes whose reversal + 1 is a square. A245362

Denominators of continued fraction convergents to sqrt(647). A42243

Number of R&E Family matchings on n edges. A256337