25115 has 4 divisors (see below), whose sum is σ = 30144. Its totient is φ = 20088.

The previous prime is 25111. The next prime is 25117. The reversal of 25115 is 51152.

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 25115 - 2² = 25111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25115.

It is not an unprimeable number, because it can be changed into a prime (25111) 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 3 ways as a sum of consecutive naturals, for example, 2507 + ... + 2516.

It is an arithmetic number, because the mean of its divisors is an integer number (7536).

2²⁵¹¹⁵ is an apocalyptic number.

25115 is a deficient number, since it is larger than the sum of its proper divisors (5029).

25115 is an equidigital number, since it uses as much as digits as its factorization.

25115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028.

The product of its digits is 50, while the sum is 14.

The square root of 25115 is about 158.4771276872. The cubic root of 25115 is about 29.2849437490.

Adding to 25115 its reverse (51152), we get a palindrome (76267).

The spelling of 25115 in words is "twenty-five thousand, one hundred fifteen".