25238391 has 8 divisors (see below), whose sum is σ = 34056960. Its totient is φ = 16622712.

The previous prime is 25238359. The next prime is 25238401. The reversal of 25238391 is 19383252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25238391 - 2⁵ = 25238359 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25238341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50431 + ... + 50928.

It is an arithmetic number, because the mean of its divisors is an integer number (4257120).

Almost surely, 2^25238391 is an apocalyptic number.

25238391 is a deficient number, since it is larger than the sum of its proper divisors (8818569).

25238391 is a wasteful number, since it uses less digits than its factorization.

25238391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101445.

The product of its digits is 12960, while the sum is 33.

The square root of 25238391 is about 5023.7825390835. The cubic root of 25238391 is about 293.3282478744.

The spelling of 25238391 in words is "twenty-five million, two hundred thirty-eight thousand, three hundred ninety-one".