25857087 has 12 divisors (see below), whose sum is σ = 34798680. Its totient is φ = 17078032.

The previous prime is 25857079. The next prime is 25857103. The reversal of 25857087 is 78075852.

It is a happy number.

It is not a de Polignac number, because 25857087 - 2³ = 25857079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25857047) 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 11 ways as a sum of consecutive naturals, for example, 95989 + ... + 96257.

It is an arithmetic number, because the mean of its divisors is an integer number (2899890).

Almost surely, 2^25857087 is an apocalyptic number.

25857087 is a deficient number, since it is larger than the sum of its proper divisors (8941593).

25857087 is an equidigital number, since it uses as much as digits as its factorization.

25857087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 25857087 is about 5084.9864306604. The cubic root of 25857087 is about 295.7058154290.

The spelling of 25857087 in words is "twenty-five million, eight hundred fifty-seven thousand, eighty-seven".