25397138 has 16 divisors (see below), whose sum is σ = 41591256. Its totient is φ = 11560320.

The previous prime is 25397137. The next prime is 25397147. The reversal of 25397138 is 83179352.

It can be written as a sum of positive squares in 4 ways, for example, as 13126129 + 12271009 = 3623^2 + 3503^2 .

It is not an unprimeable number, because it can be changed into a prime (25397137) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4793 + ... + 8588.

Almost surely, 2^25397138 is an apocalyptic number.

25397138 is a deficient number, since it is larger than the sum of its proper divisors (16194118).

25397138 is a wasteful number, since it uses less digits than its factorization.

25397138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13469.

The product of its digits is 45360, while the sum is 38.

The square root of 25397138 is about 5039.5573218290. The cubic root of 25397138 is about 293.9419648817.

The spelling of 25397138 in words is "twenty-five million, three hundred ninety-seven thousand, one hundred thirty-eight".