Properties of the Number 26865

Twenty-Six Thousand Eight Hundred Sixty-Five

Basics

Value: 26864 → 26865 → 26866

Parity: odd

Prime: No

Previous Prime: 26863

Next Prime: 26879

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 × 199

Divisors: 1, 3, 5, 9, 15, 27, 45, 135, 199, 597

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110100011110001

Octal: 64361

Duodecimal: 13669

Hexadecimal: 68f1

Square: 721728225

Square Root: 163.90546055577283

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

T(n,k)=Number of nXk 0..1 arrays with each 1 adjacent to 1 or 4 king-move neighboring 1s. A296019

Composite numbers k, not squarefree semiprimes, such that k' is a sum of distinct primorial numbers, where k' stands for the arithmetic derivative of k, A003415. A369642

Number of nX2 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 3,0,4,1,2 for x=0,1,2,3,4. A196140

Number of inequivalent (mod D₄) ways four checkers can be placed on an n X n board. A242279

Number of connected subsets of n edges of the cuboctahedron up to the 48 rotations and reflections of the cuboctahedron. A383982

Odd composites (including 1 in the count) where the number 1 mod 4 equals the number 3 mod 4. A93180

Values of·in solutions (x,y,z) to the Diophantine equation x³-x²+y³-y²=z³-z², with 1<x<y<z. A138667

Number of ballot sequences of length n having exactly eight descents. A241801

Number of n X 4 0..1 arrays with each 1 adjacent to 1 or 4 king-move neighboring 1s. A296015

Number of nX7 0..1 arrays with each 1 adjacent to 1 or 4 king-move neighboring 1s. A296018