25659 has 6 divisors (see below), whose sum is σ = 37076. Its totient is φ = 17100.

The previous prime is 25657. The next prime is 25667. The reversal of 25659 is 95652.

25659 is a `hidden beast` number, since 2 + 5 + 659 = 666.

25659 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 25659 - 2¹ = 25657 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 5 + 6⁵ + 5⁵ + 9⁴ .

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25659.

It is not an unprimeable number, because it can be changed into a prime (25657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1417 + ... + 1434.

2²⁵⁶⁵⁹ is an apocalyptic number.

25659 is a deficient number, since it is larger than the sum of its proper divisors (11417).

25659 is a wasteful number, since it uses less digits than its factorization.

25659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857 (or 2854 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 25659 is about 160.1842688905. The cubic root of 25659 is about 29.4948760611.

The spelling of 25659 in words is "twenty-five thousand, six hundred fifty-nine".