Properties of the Number 42131

Forty-Two Thousand One Hundred Thirty-One

Basics

Value: 42130 → 42131 → 42132

Parity: odd

Prime: Yes

Previous Prime: 42101

Next Prime: 42139

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 42131

Divisors: 1, 42131

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1010010010010011

Octal: 122223

Duodecimal: 2046B

Hexadecimal: a493

Square: 1775021161

Square Root: 205.25837376341067

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

Column 1 of triangle A127126. A127128

Numerators of third-order harmonic numbers (defined by Conway and Guy, 1996). A124837

Triangle, read by rows, where the g.f. of column k, C_k(x), is defined by the recurrence: C_k(x) = [ 1 + ∑_n>=k+1 C_n(x)*x^n-k ]^k+1 for k>=0. A127126

Triangle of numerators in the square of the matrix A[i,j] = 1/i for j <= i, 0 otherwise. A119947

Numbers whose digits are in nondecreasing order in bases 7 and 8. A329297

Primes in A124837. A124880

Number of closed λ-terms of size n with at most 1 free de Bruijn index. A220895

Primes p such that, if q is the next prime, p² + q is a prime times a power of 10. A352852

Primes p such that the sum of the squares of digits of p equals the sum of digits of p². A290972

Third column of A027446. A27458