Properties of the Number -42641

Forty-Two Thousand Six Hundred Forty-One

Basics

Value: -42642 → -42641 → -42640

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

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

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

a(n) = 2·a(n-1) - 5·a(n-2), with a(1) = -1, a(2) = -7. A138749

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

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