25859 has 4 divisors (see below), whose sum is σ = 27240. Its totient is φ = 24480.

The previous prime is 25849. The next prime is 25867. The reversal of 25859 is 95852.

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 25859 - 2⁸ = 25603 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25859.

It is not an unprimeable number, because it can be changed into a prime (25819) 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, 662 + ... + 699.

It is an arithmetic number, because the mean of its divisors is an integer number (6810).

2²⁵⁸⁵⁹ is an apocalyptic number.

25859 is a deficient number, since it is larger than the sum of its proper divisors (1381).

25859 is a wasteful number, since it uses less digits than its factorization.

25859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380.

The product of its digits is 3600, while the sum is 29.

The square root of 25859 is about 160.8073381410. The cubic root of 25859 is about 29.5713107708.

The spelling of 25859 in words is "twenty-five thousand, eight hundred fifty-nine".