25171116 has 12 divisors (see below), whose sum is σ = 58732632. Its totient is φ = 8390368.

The previous prime is 25171109. The next prime is 25171117. The reversal of 25171116 is 61117152.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (25171117) 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, 1048785 + ... + 1048808.

It is an arithmetic number, because the mean of its divisors is an integer number (4894386).

Almost surely, 2^25171116 is an apocalyptic number.

It is an amenable number.

25171116 is an abundant number, since it is smaller than the sum of its proper divisors (33561516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25171116 is a wasteful number, since it uses less digits than its factorization.

25171116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097600 (or 2097598 counting only the distinct ones).

The product of its digits is 420, while the sum is 24.

The square root of 25171116 is about 5017.0824190958. The cubic root of 25171116 is about 293.0673857909.

Adding to 25171116 its reverse (61117152), we get a palindrome (86288268).

The spelling of 25171116 in words is "twenty-five million, one hundred seventy-one thousand, one hundred sixteen".