25172144 has 20 divisors (see below), whose sum is σ = 48850296. Its totient is φ = 12565632.

The previous prime is 25172123. The next prime is 25172167. The reversal of 25172144 is 44127152.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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, 15767 + ... + 17289.

Almost surely, 2^25172144 is an apocalyptic number.

It is an amenable number.

25172144 is a deficient number, since it is larger than the sum of its proper divisors (23678152).

25172144 is a wasteful number, since it uses less digits than its factorization.

25172144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564 (or 2558 counting only the distinct ones).

The product of its digits is 2240, while the sum is 26.

The square root of 25172144 is about 5017.1848680311. The cubic root of 25172144 is about 293.0713754057.

Adding to 25172144 its reverse (44127152), we get a palindrome (69299296).

The spelling of 25172144 in words is "twenty-five million, one hundred seventy-two thousand, one hundred forty-four".