25391266 has 4 divisors (see below), whose sum is σ = 38086902. Its totient is φ = 12695632.

The previous prime is 25391243. The next prime is 25391297. The reversal of 25391266 is 66219352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14600041 + 10791225 = 3821^2 + 3285^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6347815 + ... + 6347818.

Almost surely, 2^25391266 is an apocalyptic number.

25391266 is a deficient number, since it is larger than the sum of its proper divisors (12695636).

25391266 is a wasteful number, since it uses less digits than its factorization.

25391266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12695635.

The product of its digits is 19440, while the sum is 34.

The square root of 25391266 is about 5038.9746972971. The cubic root of 25391266 is about 293.9193093072.

It can be divided in two parts, 253 and 91266, that added together give a palindrome (91519).

The spelling of 25391266 in words is "twenty-five million, three hundred ninety-one thousand, two hundred sixty-six".