25685 has 8 divisors (see below), whose sum is σ = 33696. Its totient is φ = 18640.

The previous prime is 25679. The next prime is 25693. The reversal of 25685 is 58652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25685 - 2⁶ = 25621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179 + ... + 288.

It is an arithmetic number, because the mean of its divisors is an integer number (4212).

2²⁵⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

25685 is a deficient number, since it is larger than the sum of its proper divisors (8011).

25685 is a wasteful number, since it uses less digits than its factorization.

25685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483.

The product of its digits is 2400, while the sum is 26.

The square root of 25685 is about 160.2654048758. The cubic root of 25685 is about 29.5048349827.

The spelling of 25685 in words is "twenty-five thousand, six hundred eighty-five".