Properties of the Number 41981

Forty-One Thousand Nine Hundred Eighty-One

Basics

Value: 41980 → 41981 → 41982

Parity: odd

Prime: Yes

Previous Prime: 41969

Next Prime: 41983

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 41981

Divisors: 1, 41981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010001111111101

Octal: 121775

Duodecimal: 20365

Hexadecimal: a3fd

Square: 1762404361

Square Root: 204.89265482198232

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, South spoke). A54566

Primes which are a concatenation of prime(n) and n. A84669

Numbers k such that binomial(3k, k) + 1 is prime. A125221

Primes of the form k² - prime(k). A188831

a(n) is the number of permutations of length n that avoid the pattern 321 and the mesh pattern (12, 363) or the same sequence for the mesh patterns (12, 399), (12, 429), (12, 483). A289598

Primes p with f(p), f(f(p)) and f(f(f(p))) all prime, where f(n) = prime(n) - n + 1. A235934

a(0) = a(1) = 1; for n >= 2, a(n) = a(n-1) + a(n-2) - n if that number is positive and not already in the sequence, otherwise a(n) = a(n-1) + a(n-2) + n. A117821

Number of partitions of n with difference 5 between the number of odd parts and the number of even parts, both counted without multiplicity. A242696

Initial members of prime quadruples (n, n+2, n+36, n+38). A248367

Expansion of 1/(1 - x - x²/(1 + x²/(1 + x³/(1 + x⁴/(1 + x⁵/(1 + ...)))))), a continued fraction. A302016