25172403 has 16 divisors (see below), whose sum is σ = 35306496. Its totient is φ = 15930720.

The previous prime is 25172387. The next prime is 25172417. The reversal of 25172403 is 30427152.

It is not a de Polignac number, because 25172403 - 2⁴ = 25172387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25172423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2376 + ... + 7482.

It is an arithmetic number, because the mean of its divisors is an integer number (2206656).

Almost surely, 2^25172403 is an apocalyptic number.

25172403 is a deficient number, since it is larger than the sum of its proper divisors (10134093).

25172403 is a wasteful number, since it uses less digits than its factorization.

25172403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5194.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 25172403 is about 5017.2106792520. The cubic root of 25172403 is about 293.0723805542.

Adding to 25172403 its reverse (30427152), we get a palindrome (55599555).

The spelling of 25172403 in words is "twenty-five million, one hundred seventy-two thousand, four hundred three".