25657225 has 24 divisors (see below), whose sum is σ = 35176320. Its totient is φ = 18408000.

The previous prime is 25657211. The next prime is 25657241. The reversal of 25657225 is 52275652.

It is not a de Polignac number, because 25657225 - 2¹³ = 25649033 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21135 + ... + 22315.

It is an arithmetic number, because the mean of its divisors is an integer number (1465680).

Almost surely, 2^25657225 is an apocalyptic number.

25657225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25657225 is a deficient number, since it is larger than the sum of its proper divisors (9519095).

25657225 is a wasteful number, since it uses less digits than its factorization.

25657225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281 (or 1276 counting only the distinct ones).

The product of its digits is 42000, while the sum is 34.

The square root of 25657225 is about 5065.2961413919. The cubic root of 25657225 is about 294.9419592794.

The spelling of 25657225 in words is "twenty-five million, six hundred fifty-seven thousand, two hundred twenty-five".