25915625 has 12 divisors (see below), whose sum is σ = 32396364. Its totient is φ = 20730000.

The previous prime is 25915621. The next prime is 25915663. The reversal of 25915625 is 52651952.

It can be written as a sum of positive squares in 6 ways, for example, as 23921881 + 1993744 = 4891^2 + 1412^2 .

It is not a de Polignac number, because 25915625 - 2² = 25915621 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25915621) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1022 + ... + 7271.

It is an arithmetic number, because the mean of its divisors is an integer number (2699697).

Almost surely, 2^25915625 is an apocalyptic number.

25915625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25915625 is a deficient number, since it is larger than the sum of its proper divisors (6480739).

25915625 is an frugal number, since it uses more digits than its factorization.

25915625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8318 (or 8298 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

The square root of 25915625 is about 5090.7391408321. The cubic root of 25915625 is about 295.9287972454.

The spelling of 25915625 in words is "twenty-five million, nine hundred fifteen thousand, six hundred twenty-five".