Properties of the Number 26645

Twenty-Six Thousand Six Hundred Forty-Five

Basics

Value: 26644 → 26645 → 26646

Parity: odd

Prime: No

Previous Prime: 26641

Next Prime: 26647

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 73 ²

Divisors: 1, 5, 73, 365, 5329, 26645

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110100000010101

Octal: 64025

Duodecimal: 13505

Hexadecimal: 6815

Square: 709956025

Square Root: 163.23296235748464

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

Number of integer partitions of n where some part is the difference of two consecutive parts. A364467

Numbers k such that σ(k) = ψ(k) + τ(k). A387953

Smallest b such that the k consecutive primes starting with prime(n) are all base-b Wieferich primes, i.e., satisfy b^p-1 == 1 (mod p²). Square array A(n, k), read by antidiagonals downwards. A286816

A(n, k) is the k-th number b > 1 such that b^prime(n+i-1) == 1 (mod prime(n+i)²) for each i = 0..2, with k running over the positive integers; square array, read by antidiagonals, downwards. A319060

a(n) is the smallest b > 1 such that prime(n), prime(n+1) and prime(n+2) are all base-b Wieferich primes. A344827

Odd numbers k, not powers of primes, such that σ(k) == 2 modulo 8 and σ(σ(k)) == 6 modulo 8. A332458

Positive numbers y such that y² is of the form x²+(x+233)² with integer x. A157297

Powers of fourth root of 23 rounded to nearest integer. A18112

Number of starting positions of Kayles with n pieces such that the 2nd player can win (P-positions). A263453

Powers of fourth root of 23 rounded up. A18113