Properties of the Number 42641

Forty-Two Thousand Six Hundred Forty-One

Basics

Value: 42640 → 42641 → 42642

Parity: odd

Prime: Yes

Previous Prime: 42611

Next Prime: 42643

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 42641

Divisors: 1, 42641

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010011010010001

Octal: 123221

Duodecimal: 20815

Hexadecimal: a691

Square: 1818254881

Square Root: 206.49697334343668

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

Prime number spiral (clockwise, West spoke). A54570

Primes p such that p = q² + 8·r² where q and r are also primes. A260556

Expansion of (-1+3·x)/(5·x² + 1 - 2·x). A116484

Numerator of real part of (3·i - 1)^-n. A124869

Primes p of the form k*(k + 1) - 1 such that p and p + 2 are twin primes. A88486

a(n) = A118443(n)/(n+1), where A118443 is the row sums of triangle A118441. A118444

Denominators of continued fraction convergents to sqrt(355). A41673

Denominators of continued fraction convergents to sqrt(663). A42275

Sixth term of weak prime sextet: p(m-4)-p(m-5) < p(m-3)-p(m-4) < p(m-2)-p(m-3) < p(m-1)-p(m-2) < p(m)-p(m-1). A54833

Lesser of twin primes p1 such that p1·p2+-6 are prime numbers. A174955