25135625 has 20 divisors (see below), whose sum is σ = 31752336. Its totient is φ = 19890000.

The previous prime is 25135609. The next prime is 25135631. The reversal of 25135625 is 52653152.

It is a happy number.

It is not a de Polignac number, because 25135625 - 2⁴ = 25135609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 81722 + ... + 82028.

Almost surely, 2^25135625 is an apocalyptic number.

25135625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25135625 is a deficient number, since it is larger than the sum of its proper divisors (6616711).

25135625 is an equidigital number, since it uses as much as digits as its factorization.

25135625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 443 counting only the distinct ones).

The product of its digits is 9000, while the sum is 29.

The square root of 25135625 is about 5013.5441555849. The cubic root of 25135625 is about 292.9295803929.

Adding to 25135625 its reverse (52653152), we get a palindrome (77788777).

The spelling of 25135625 in words is "twenty-five million, one hundred thirty-five thousand, six hundred twenty-five".