25603025 has 24 divisors (see below), whose sum is σ = 37866624. Its totient is φ = 16790400.

The previous prime is 25603009. The next prime is 25603043. The reversal of 25603025 is 52030652.

It is a happy number.

It is not a de Polignac number, because 25603025 - 2⁴ = 25603009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

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 23 ways as a sum of consecutive naturals, for example, 845 + ... + 7205.

It is an arithmetic number, because the mean of its divisors is an integer number (1577776).

Almost surely, 2^25603025 is an apocalyptic number.

25603025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25603025 is a deficient number, since it is larger than the sum of its proper divisors (12263599).

25603025 is a wasteful number, since it uses less digits than its factorization.

25603025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401 (or 6396 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 25603025 is about 5059.9431814992. The cubic root of 25603025 is about 294.7341279708.

Adding to 25603025 its reverse (52030652), we get a palindrome (77633677).

The spelling of 25603025 in words is "twenty-five million, six hundred three thousand, twenty-five".