25009000 has 64 divisors (see below), whose sum is σ = 59389200. Its totient is φ = 9856000.

The previous prime is 25008961. The next prime is 25009031. The reversal of 25009000 is 90052.

It can be written as a sum of positive squares in 8 ways, for example, as 268324 + 24740676 = 518^2 + 4974^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88860 + ... + 89140.

Almost surely, 2^25009000 is an apocalyptic number.

25009000 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 25009000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29694600).

25009000 is an abundant number, since it is smaller than the sum of its proper divisors (34380200).

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

25009000 is a wasteful number, since it uses less digits than its factorization.

25009000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 25009000 is about 5000.8999190146. The cubic root of 25009000 is about 292.4368578244.

Adding to 25009000 its reverse (90052), we get a palindrome (25099052).

The spelling of 25009000 in words is "twenty-five million, nine thousand".