Properties of the Number 25840

Twenty-Five Thousand Eight Hundred Forty

Basics

Value: 25839 → 25840 → 25841

Parity: even

Prime: No

Previous Prime: 25819

Next Prime: 25841

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ⁴ × 5 × 17 × 19

Divisors: 1, 2, 4, 5, 8, 10, 16, 17, 19, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010011110000

Octal: 62360

Duodecimal: 12B54

Hexadecimal: 64f0

Square: 667705600

Square Root: 160.74825037928096

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

Expansion of ∏_k>=1 1/(1-x^2·k-1)^2·k-1. A262811

Expansion of ∏_k>=1 1/(1+x^2·k-1)^2·k-1. A284628

Row 9 of array in A288580. A92974

Place n points on each of the three sides of a triangle, 3n points in all; a(n) = number of nondegenerate triangles that can be constructed using these points (plus the 3 original vertices) as vertices. A130748

Rounded sums of the non-integer cube roots of n, as partitioned by the integer roots: round(∑_{j=n³+1..(n+1)³-1} j^1/3). A248575

Fibonacci sequence beginning 0, 10. A22093

a(n) = a(n-1) + 2·a(n-2) - a(n-3) - a(n-4), a(0)=0, a(1)=8, a(2)=10, a(3)=18. A153382

a(n) = (Lucas(4n) - Lucas(2n))/4. A215465

a(n) = binomial(n+2,2)*binomial(n+5,2). A105938

a(1)=1, a(n) = a(n-1) + n⁵ if n odd, a(n) = a(n-1) + n⁴ if n is even. A135214