25172645 has 8 divisors (see below), whose sum is σ = 30719520. Its totient is φ = 19796560.

The previous prime is 25172627. The next prime is 25172659. The reversal of 25172645 is 54627152.

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

It is not a de Polignac number, because 25172645 - 2¹⁰ = 25171621 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42371 + ... + 42960.

It is an arithmetic number, because the mean of its divisors is an integer number (3839940).

Almost surely, 2^25172645 is an apocalyptic number.

It is an amenable number.

25172645 is a deficient number, since it is larger than the sum of its proper divisors (5546875).

25172645 is an equidigital number, since it uses as much as digits as its factorization.

25172645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85395.

The product of its digits is 16800, while the sum is 32.

The square root of 25172645 is about 5017.2347961801. The cubic root of 25172645 is about 293.0733197214.

Adding to 25172645 its reverse (54627152), we get a palindrome (79799797).

The spelling of 25172645 in words is "twenty-five million, one hundred seventy-two thousand, six hundred forty-five".