Properties of the Number 26140

Twenty-Six Thousand One Hundred Forty

Basics

Value: 26139 → 26140 → 26141

Parity: even

Prime: No

Previous Prime: 26119

Next Prime: 26141

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 1307

Divisors: 1, 2, 4, 5, 10, 20, 1307, 2614, 5228, 6535

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110011000011100

Octal: 63034

Duodecimal: 13164

Hexadecimal: 661c

Square: 683299600

Square Root: 161.67869371070512

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 maximal primitive subsets of {1..n}. A326077

a(n) = a(n-1) + a(n-1-(number of odd terms so far)). A7604

Same rule as Aitken triangle (A011971) except a(0,0)=0, a(1,0)=1. A46936

Expansion of ∏_k>=0 ((1+x^3·k+1)/(1-x^3·k+1))². A261649

Number of ways to place n nonattacking composite pieces rook + rider[5,6] on an n X n chessboard. A189863

T(n,k) = number of 1:4:sqrt(17) proportioned triangles on a (n+1) X (k+1) grid. A189885

a(n) = (1/2)*(s(n) - 1), where s = A026139. A26140

Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally and vertically. A254236

Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A257427

Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. A299678