25002500 has 60 divisors (see below), whose sum is σ = 55829004. Its totient is φ = 9792000.

The previous prime is 25002487. The next prime is 25002511. The reversal of 25002500 is 520052.

It can be written as a sum of positive squares in 10 ways, for example, as 17505856 + 7496644 = 4184^2 + 2738^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 182432 + ... + 182568.

Almost surely, 2^25002500 is an apocalyptic number.

25002500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25002500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27914502).

25002500 is an abundant number, since it is smaller than the sum of its proper divisors (30826504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25002500 is a wasteful number, since it uses less digits than its factorization.

25002500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 25002500 is about 5000.2499937503. The cubic root of 25002500 is about 292.4115202222.

Adding to 25002500 its reverse (520052), we get a palindrome (25522552).

The spelling of 25002500 in words is "twenty-five million, two thousand, five hundred".