Properties of the Number 6525

Six Thousand Five Hundred Twenty-Five

Basics

Value: 6524 → 6525 → 6526

Parity: odd

Prime: No

Previous Prime: 6521

Next Prime: 6529

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 ² × 29

Divisors: 1, 3, 5, 9, 15, 25, 29, 45, 75, 87

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100101111101

Octal: 14575

Duodecimal: 3939

Hexadecimal: 197d

Square: 42575625

Square Root: 80.77747210701756

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

Centered icosahedral (or cuboctahedral) numbers, also crystal ball sequence for f.c.c. lattice. A5902

18-gonal (or octadecagonal) numbers: a(n) = n*(8·n-7). A51870

a(n) = n*(n+2)*(n-2)/3. A77415

Minimal (positive) solution a(n) of Pell equation b(n)² - D(n)*a(n)² = +4 with D(n)= A077425(n). The companion sequence is a(n)=A077428(n). A78355

a(n) = (2·n - 1)*n². A15237

T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically. A207442

From substitutional generation of Kolakoski sequence (A000002). A42942

a(n) = ∑_k=1..n lcm(n,k). A51193

Sum of the smallest parts of the partitions of 4n into 4 parts with smallest part greater than 1. A238706

Row sums of the triangle in A199332. A199771