25128325 has 6 divisors (see below), whose sum is σ = 31159154. Its totient is φ = 20102640.

The previous prime is 25128319. The next prime is 25128343. The reversal of 25128325 is 52382152.

It can be written as a sum of positive squares in 3 ways, for example, as 1304164 + 23824161 = 1142^2 + 4881^2 .

It is not a de Polignac number, because 25128325 - 2⁵ = 25128293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25128293 and 25128302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 502542 + ... + 502591.

Almost surely, 2^25128325 is an apocalyptic number.

25128325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25128325 is a deficient number, since it is larger than the sum of its proper divisors (6030829).

25128325 is a wasteful number, since it uses less digits than its factorization.

25128325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005143 (or 1005138 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 25128325 is about 5012.8160748226. The cubic root of 25128325 is about 292.9012196767.

The spelling of 25128325 in words is "twenty-five million, one hundred twenty-eight thousand, three hundred twenty-five".