Properties of the Number 8625

Eight Thousand Six Hundred Twenty-Five

Basics

Value: 8624 → 8625 → 8626

Parity: odd

Prime: No

Previous Prime: 8623

Next Prime: 8627

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 ³ × 23

Divisors: 1, 3, 5, 15, 23, 25, 69, 75, 115, 125

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000110110001

Octal: 20661

Duodecimal: 4BA9

Hexadecimal: 21b1

Square: 74390625

Square Root: 92.87087810503355

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

Numbers m such that there are precisely 7 groups of order m. A249550

a(n) = n*(n+2)*(2·n-1)/3. Also, row sums of triangle A131422. A131423

Partial sum of centered tetrahedral numbers A005894. A132366

Triangle read by rows, related to Pascal's triangle, starting with rows 1; 1,1. A91533

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250592

Numbers n such that n is not the power of a prime and such that for every prime divisor p of n, p-1 divides n-1. A87442

Numbers k with exactly three distinct prime factors and such that cototient(k) is a square. A306670

Numbers k such that numerator of ∑_i=1..k 1/(prime(i)-1) is prime. A92063

Numbers n such that primorial(n)/2 - 64 is prime. A139448

Numbers that have exactly 5 representations as a k-gonal number, P(n,k) = n*((k-2)*n - (k-4))/2, k and n >= 3. A321156