25725278 has 8 divisors (see below), whose sum is σ = 40618920. Its totient is φ = 12185640.

The previous prime is 25725251. The next prime is 25725281. The reversal of 25725278 is 87252752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 676981 = 25725278 / (2 + 5 + 7 + 2 + 5 + 2 + 7 + 8).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338453 + ... + 338528.

It is an arithmetic number, because the mean of its divisors is an integer number (5077365).

Almost surely, 2^25725278 is an apocalyptic number.

25725278 is a deficient number, since it is larger than the sum of its proper divisors (14893642).

25725278 is a wasteful number, since it uses less digits than its factorization.

25725278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677002.

The product of its digits is 78400, while the sum is 38.

The square root of 25725278 is about 5072.0092665530. The cubic root of 25725278 is about 295.2024962272.

The spelling of 25725278 in words is "twenty-five million, seven hundred twenty-five thousand, two hundred seventy-eight".