25538125 has 20 divisors (see below), whose sum is σ = 33036300. Its totient is φ = 19712000.

The previous prime is 25538099. The next prime is 25538167. The reversal of 25538125 is 52183552.

It can be written as a sum of positive squares in 10 ways, for example, as 24740676 + 797449 = 4974^2 + 893^2 .

It is not a de Polignac number, because 25538125 - 2²¹ = 23440973 is a prime.

It is a congruent 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, 17421 + ... + 18829.

It is an arithmetic number, because the mean of its divisors is an integer number (1651815).

Almost surely, 2^25538125 is an apocalyptic number.

25538125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25538125 is a deficient number, since it is larger than the sum of its proper divisors (7498175).

25538125 is an equidigital number, since it uses as much as digits as its factorization.

25538125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458 (or 1443 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 25538125 is about 5053.5259967670. The cubic root of 25538125 is about 294.4848809885.

The spelling of 25538125 in words is "twenty-five million, five hundred thirty-eight thousand, one hundred twenty-five".