25438087 has 4 divisors (see below), whose sum is σ = 25528896. Its totient is φ = 25347280.

The previous prime is 25438057. The next prime is 25438111. The reversal of 25438087 is 78083452.

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 25438087 - 2¹⁵ = 25405319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25438057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44983 + ... + 45544.

It is an arithmetic number, because the mean of its divisors is an integer number (6382224).

Almost surely, 2^25438087 is an apocalyptic number.

25438087 is a deficient number, since it is larger than the sum of its proper divisors (90809).

25438087 is an equidigital number, since it uses as much as digits as its factorization.

25438087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90808.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 25438087 is about 5043.6184431418. The cubic root of 25438087 is about 294.0998588701.

The spelling of 25438087 in words is "twenty-five million, four hundred thirty-eight thousand, eighty-seven".