25911 has 6 divisors (see below), whose sum is σ = 37440. Its totient is φ = 17268.

The previous prime is 25903. The next prime is 25913. The reversal of 25911 is 11952.

It is not a de Polignac number, because 25911 - 2³ = 25903 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25913) 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, 1431 + ... + 1448.

It is an arithmetic number, because the mean of its divisors is an integer number (6240).

2²⁵⁹¹¹ is an apocalyptic number.

25911 is a deficient number, since it is larger than the sum of its proper divisors (11529).

25911 is a wasteful number, since it uses less digits than its factorization.

25911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885 (or 2882 counting only the distinct ones).

The product of its digits is 90, while the sum is 18.

The square root of 25911 is about 160.9689411036. The cubic root of 25911 is about 29.5911192009.

The spelling of 25911 in words is "twenty-five thousand, nine hundred eleven".