25578725 has 12 divisors (see below), whose sum is σ = 32812260. Its totient is φ = 19756800.

The previous prime is 25578719. The next prime is 25578743. The reversal of 25578725 is 52787552.

It can be written as a sum of positive squares in 6 ways, for example, as 2211169 + 23367556 = 1487^2 + 4834^2 .

It is not a de Polignac number, because 25578725 - 2⁶ = 25578661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16916 + ... + 18365.

It is an arithmetic number, because the mean of its divisors is an integer number (2734355).

Almost surely, 2^25578725 is an apocalyptic number.

25578725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25578725 is a deficient number, since it is larger than the sum of its proper divisors (7233535).

25578725 is a wasteful number, since it uses less digits than its factorization.

25578725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35320 (or 35315 counting only the distinct ones).

The product of its digits is 196000, while the sum is 41.

The square root of 25578725 is about 5057.5413987431. The cubic root of 25578725 is about 294.6408537535.

The spelling of 25578725 in words is "twenty-five million, five hundred seventy-eight thousand, seven hundred twenty-five".