Properties of the Number 81926

Eighty-One Thousand Nine Hundred Twenty-Six

Basics

Value: 81925 → 81926 → 81927

Parity: even

Prime: No

Previous Prime: 81919

Next Prime: 81929

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 13 × 23 × 137

Divisors: 1, 2, 13, 23, 26, 46, 137, 274, 299, 598

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 10100000000000110

Octal: 240006

Duodecimal: 3B4B2

Hexadecimal: 14006

Square: 6711869476

Square Root: 286.2271824967014

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) is the largest integer that can be written with n digits in base 3/2. A304025

The expansion of R(q)^-5 in powers of q where R() is the Rogers-Ramanujan continued fraction. A229793

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 577", based on the 5-celled von Neumann neighborhood. A283086

The largest positive even integer that can be represented with n digits in base 3/2. A305497

a(n) = ∑_k=0..n binomial(4·n,k) * binomial(2·n-k,n-k). A386919

Lexicographically earliest sequence of positive integers such that for any m and n with m <= n, a(m) XOR ... XOR a(n) is neither null nor prime (where XOR denotes the bitwise XOR operator). A333403

Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. A303178

Lexicographically earliest sequence of distinct positive integers such that for any nonempty set of k positive integers, say {m₁, ..., m_k}, a(m₁) XOR ... XOR a(m_k) is neither null nor prime (where XOR denotes the bitwise XOR operator). A333522

Even numbers such that the sum of the odd divisors is a Fibonacci number F and the sum of the even divisors is 2F. A274062

T(n,k) = Number of n X k 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. A303182