25172369 has 4 divisors (see below), whose sum is σ = 25548144. Its totient is φ = 24796596.

The previous prime is 25172363. The next prime is 25172383. The reversal of 25172369 is 96327152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25172369 - 2⁴ = 25172353 is a prime.

It is a super-2 number, since 2×25172369² = 1267296322144322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25172363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187787 + ... + 187920.

It is an arithmetic number, because the mean of its divisors is an integer number (6387036).

Almost surely, 2^25172369 is an apocalyptic number.

It is an amenable number.

25172369 is a deficient number, since it is larger than the sum of its proper divisors (375775).

25172369 is an equidigital number, since it uses as much as digits as its factorization.

25172369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375774.

The product of its digits is 22680, while the sum is 35.

The square root of 25172369 is about 5017.2072909139. The cubic root of 25172369 is about 293.0722486046.

The spelling of 25172369 in words is "twenty-five million, one hundred seventy-two thousand, three hundred sixty-nine".