Properties of the Number -81001

Eighty-One Thousand One

Basics

Value: -81002 → -81001 → -81000

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 81001

Divisors: 1, 81001

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10011110001101001

Octal: -236151

Duodecimal: -3AA61

Hexadecimal: -13c69

Square: 6561162001

Square Root: 284.6067462306542

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) = numerator of the coefficient c(n) of xⁿ in sqrt(1+x)/∏_k=1..n-1 1 + c(k)*x^k, n = 1, 2, 3, ... A170922

Primes having only {0, 1, 8} as digits. A61247

Square-loop primes. A108660

Antidiagonal sums of triangle A118180: a(n) = ∑_k=0..[n/2] (3^k)^n-2·k for n>=0. A118182

Primes of the form (p² - 1)/8 - p, where p is also a prime. A165567

Primes consisting of all of the cube digits (i.e., 0, 1 and 8) at least once. A180685

Primes of the form 3n³+1. A201112

Primes of the form 10n² + 1. A201709

Number of (n+2) X 8 0..1 matrices with each 3 X 3 subblock idempotent. A224557

Centered 25-gonal primes. A276264