25515025 has 12 divisors (see below), whose sum is σ = 32041600. Its totient is φ = 20152080.

The previous prime is 25514989. The next prime is 25515029. The reversal of 25515025 is 52051552.

It is a happy number.

It is not a de Polignac number, because 25515025 - 2⁹ = 25514513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (25515029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4485 + ... + 8434.

Almost surely, 2^25515025 is an apocalyptic number.

25515025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25515025 is a deficient number, since it is larger than the sum of its proper divisors (6526575).

25515025 is a wasteful number, since it uses less digits than its factorization.

25515025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13008 (or 13003 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 25515025 is about 5051.2399467853. The cubic root of 25515025 is about 294.3960640682.

Adding to 25515025 its reverse (52051552), we get a palindrome (77566577).

The spelling of 25515025 in words is "twenty-five million, five hundred fifteen thousand, twenty-five".