25681725 has 24 divisors (see below), whose sum is σ = 47179520. Its totient is φ = 13696560.

The previous prime is 25681717. The next prime is 25681729. The reversal of 25681725 is 52718652.

It is a happy number.

It is not a de Polignac number, because 25681725 - 2³ = 25681717 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25681725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25681729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18349 + ... + 19698.

Almost surely, 2^25681725 is an apocalyptic number.

25681725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25681725 is a deficient number, since it is larger than the sum of its proper divisors (21497795).

25681725 is a wasteful number, since it uses less digits than its factorization.

25681725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38066 (or 38055 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 25681725 is about 5067.7139816687. The cubic root of 25681725 is about 295.0358091166.

The spelling of 25681725 in words is "twenty-five million, six hundred eighty-one thousand, seven hundred twenty-five".