Properties of the Number 82081

Eighty-Two Thousand Eighty-One

Basics

Value: 82080 → 82081 → 82082

Parity: odd

Prime: No

Previous Prime: 82073

Next Prime: 82129

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 79 × 1039

Divisors: 1, 79, 1039, 82081

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100000010100001

Octal: 240241

Duodecimal: 3B601

Hexadecimal: 140a1

Square: 6737290561

Square Root: 286.497818490822

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) = A047080(2·n, n+1). A47087

Number of -n..n arrays x(0..3) of 4 elements with zero sum, and adjacent elements not both strictly positive and not both strictly negative. A199899

Integers k such that the number of divisors of k² - 1 (A347191) sets a new record. A347192

Denominators of continued fraction convergents to sqrt(142). A41261

Denominators of continued fraction convergents to sqrt(279). A41525

Denominators of continued fraction convergents to sqrt(568). A42089

G.f. = continued fraction: A(x)=1/(1-x-x²-x³/(1-x⁴-x⁵-x⁶/(1-x⁷-x⁸-x⁹/(...)))). A88353

Crystal ball sequence for squashed {D₅}^* lattice, perhaps the smallest example of a "non-superficial" lattice. A10025

The n-th term is the smallest integer > 1 that is congruent to +1 or -1 modulo k for all 2 <= k <= n. A317650

Numbers k such that 79·2^k-1 is prime. A50565