25685387 has 16 divisors (see below), whose sum is σ = 32706240. Its totient is φ = 19619712.

The previous prime is 25685371. The next prime is 25685399. The reversal of 25685387 is 78358652.

It is not a de Polignac number, because 25685387 - 2⁴ = 25685371 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (25685347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2228 + ... + 7505.

It is an arithmetic number, because the mean of its divisors is an integer number (2044140).

Almost surely, 2^25685387 is an apocalyptic number.

25685387 is a deficient number, since it is larger than the sum of its proper divisors (7020853).

25685387 is a wasteful number, since it uses less digits than its factorization.

25685387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9782.

The product of its digits is 403200, while the sum is 44.

The square root of 25685387 is about 5068.0752756841. The cubic root of 25685387 is about 295.0498316662.

The spelling of 25685387 in words is "twenty-five million, six hundred eighty-five thousand, three hundred eighty-seven".