25808925 has 24 divisors (see below), whose sum is σ = 42915904. Its totient is φ = 13685760.

The previous prime is 25808903. The next prime is 25808929. The reversal of 25808925 is 52980852.

It is not a de Polignac number, because 25808925 - 2⁹ = 25808413 is a prime.

It is a super-2 number, since 2×25808925² = 1332201219311250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25808929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13584 + ... + 15366.

Almost surely, 2^25808925 is an apocalyptic number.

25808925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25808925 is a deficient number, since it is larger than the sum of its proper divisors (17106979).

25808925 is a wasteful number, since it uses less digits than its factorization.

25808925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989 (or 1984 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 25808925 is about 5080.2485175432. The cubic root of 25808925 is about 295.5221051887.

The spelling of 25808925 in words is "twenty-five million, eight hundred eight thousand, nine hundred twenty-five".