25172127 has 24 divisors (see below), whose sum is σ = 38263680. Its totient is φ = 16533720.

The previous prime is 25172123. The next prime is 25172167. The reversal of 25172127 is 72127152.

It is not a de Polignac number, because 25172127 - 2² = 25172123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 25172127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25172123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16524 + ... + 17982.

It is an arithmetic number, because the mean of its divisors is an integer number (1594320).

Almost surely, 2^25172127 is an apocalyptic number.

25172127 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

25172127 is a deficient number, since it is larger than the sum of its proper divisors (13091553).

25172127 is an equidigital number, since it uses as much as digits as its factorization.

25172127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545 (or 1533 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 25172127 is about 5017.1831738536. The cubic root of 25172127 is about 293.0713094305.

Adding to 25172127 its reverse (72127152), we get a palindrome (97299279).

The spelling of 25172127 in words is "twenty-five million, one hundred seventy-two thousand, one hundred twenty-seven".