25085791 has 4 divisors (see below), whose sum is σ = 25439184. Its totient is φ = 24732400.

The previous prime is 25085779. The next prime is 25085831. The reversal of 25085791 is 19758052.

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 25085791 - 2⁵ = 25085759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25085791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25089791) 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, 176590 + ... + 176731.

It is an arithmetic number, because the mean of its divisors is an integer number (6359796).

Almost surely, 2^25085791 is an apocalyptic number.

25085791 is a deficient number, since it is larger than the sum of its proper divisors (353393).

25085791 is an equidigital number, since it uses as much as digits as its factorization.

25085791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353392.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 25085791 is about 5008.5717525059. The cubic root of 25085791 is about 292.7358644936.

The spelling of 25085791 in words is "twenty-five million, eighty-five thousand, seven hundred ninety-one".