25145165 has 4 divisors (see below), whose sum is σ = 30174204. Its totient is φ = 20116128.

The previous prime is 25145149. The next prime is 25145171. The reversal of 25145165 is 56154152.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13942756 + 11202409 = 3734^2 + 3347^2 .

It is a cyclic number.

It is not a de Polignac number, because 25145165 - 2⁴ = 25145149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2514512 + ... + 2514521.

It is an arithmetic number, because the mean of its divisors is an integer number (7543551).

Almost surely, 2^25145165 is an apocalyptic number.

It is an amenable number.

25145165 is a deficient number, since it is larger than the sum of its proper divisors (5029039).

25145165 is an equidigital number, since it uses as much as digits as its factorization.

25145165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029038.

The product of its digits is 6000, while the sum is 29.

The square root of 25145165 is about 5014.4954880825. The cubic root of 25145165 is about 292.9666352997.

The spelling of 25145165 in words is "twenty-five million, one hundred forty-five thousand, one hundred sixty-five".