25728925 has 6 divisors (see below), whose sum is σ = 31903898. Its totient is φ = 20583120.

The previous prime is 25728917. The next prime is 25728971. The reversal of 25728925 is 52982752.

It can be written as a sum of positive squares in 3 ways, for example, as 8514724 + 17214201 = 2918^2 + 4149^2 .

It is not a de Polignac number, because 25728925 - 2³ = 25728917 is a prime.

It is a Duffinian number.

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 5 ways as a sum of consecutive naturals, for example, 514554 + ... + 514603.

Almost surely, 2^25728925 is an apocalyptic number.

25728925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25728925 is a deficient number, since it is larger than the sum of its proper divisors (6174973).

25728925 is a wasteful number, since it uses less digits than its factorization.

25728925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029167 (or 1029162 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 25728925 is about 5072.3687760257. The cubic root of 25728925 is about 295.2164455761.

The spelling of 25728925 in words is "twenty-five million, seven hundred twenty-eight thousand, nine hundred twenty-five".