25165 has 8 divisors (see below), whose sum is σ = 34560. Its totient is φ = 17232.

The previous prime is 25163. The next prime is 25169. The reversal of 25165 is 56152.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25165 - 2¹ = 25163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25163) by changing a digit.

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, 325 + ... + 394.

It is an arithmetic number, because the mean of its divisors is an integer number (4320).

2²⁵¹⁶⁵ is an apocalyptic number.

It is an amenable number.

25165 is a deficient number, since it is larger than the sum of its proper divisors (9395).

25165 is an equidigital number, since it uses as much as digits as its factorization.

25165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its digits is 300, while the sum is 19.

The square root of 25165 is about 158.6348007217. The cubic root of 25165 is about 29.3043647666.

It can be divided in two parts, 25 and 165, that added together give a triangular number (190 = T₁₉).

The spelling of 25165 in words is "twenty-five thousand, one hundred sixty-five".