Properties of the Number 2500

Two Thousand Five Hundred

Basics

Value: 2499 → 2500 → 2501

Parity: even

Prime: No

Previous Prime: 2477

Next Prime: 2503

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 ⁴

Divisors: 1, 2, 4, 5, 10, 20, 25, 50, 100, 125

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100111000100

Octal: 4704

Duodecimal: 1544

Hexadecimal: 9c4

Square: 6250000

Square Root: 50

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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: Yes

Fermat Number: No

Cullen Number: No

OEIS Sequences

The squares: a(n) = n². A290

a(n) = sigma₂(n): sum of squares of divisors of n. A1157

Powerful numbers (A001694) that are not prime powers (A000961). A286708

Even squares: a(n) = (2·n)². A16742

Number of regions in regular n-gon with all diagonals drawn. A7678

Numbers of the form 2ⁱ*5^j with i, j >= 0. A3592

Number of weakly ordered plane trees with n leaves. A196545

Perfect powers of nonprimes (m^k where m is a nonprime positive integer and k >= 2). A131605

Tetranacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4) with a(0) = a(1) = a(2) = a(3) = 1. A288

a(n) = ∏_k=1..n k^{2k - 1 - n}. A1142