25904891 has 4 divisors (see below), whose sum is σ = 25938192. Its totient is φ = 25871592.

The previous prime is 25904887. The next prime is 25904929. The reversal of 25904891 is 19840952.

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

It is a cyclic number.

It is not a de Polignac number, because 25904891 - 2² = 25904887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25904861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15455 + ... + 17048.

It is an arithmetic number, because the mean of its divisors is an integer number (6484548).

Almost surely, 2^25904891 is an apocalyptic number.

25904891 is a deficient number, since it is larger than the sum of its proper divisors (33301).

25904891 is an equidigital number, since it uses as much as digits as its factorization.

25904891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33300.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 25904891 is about 5089.6847643052. The cubic root of 25904891 is about 295.8879346593.

The spelling of 25904891 in words is "twenty-five million, nine hundred four thousand, eight hundred ninety-one".