25397122 has 32 divisors (see below), whose sum is σ = 41094144. Its totient is φ = 11750400.

The previous prime is 25397093. The next prime is 25397137. The reversal of 25397122 is 22179352.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246523 + ... + 246625.

It is an arithmetic number, because the mean of its divisors is an integer number (1284192).

Almost surely, 2^25397122 is an apocalyptic number.

25397122 is a deficient number, since it is larger than the sum of its proper divisors (15697022).

25397122 is a wasteful number, since it uses less digits than its factorization.

25397122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274.

The product of its digits is 7560, while the sum is 31.

The square root of 25397122 is about 5039.5557343877. Note that the first 3 decimals coincide. The cubic root of 25397122 is about 293.9419031547.

The spelling of 25397122 in words is "twenty-five million, three hundred ninety-seven thousand, one hundred twenty-two".