25991272 has 8 divisors (see below), whose sum is σ = 48733650. Its totient is φ = 12995632.

The previous prime is 25991269. The next prime is 25991281. The reversal of 25991272 is 27219952.

It can be written as a sum of positive squares in only one way, i.e., 25948836 + 42436 = 5094^2 + 206^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) 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 as a sum of consecutive naturals, namely, 1624447 + ... + 1624462.

Almost surely, 2^25991272 is an apocalyptic number.

It is an amenable number.

25991272 is a deficient number, since it is larger than the sum of its proper divisors (22742378).

25991272 is a wasteful number, since it uses less digits than its factorization.

25991272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248915 (or 3248911 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 25991272 is about 5098.1635909413. The cubic root of 25991272 is about 296.2164535593.

The spelling of 25991272 in words is "twenty-five million, nine hundred ninety-one thousand, two hundred seventy-two".