12225171 has 16 divisors (see below), whose sum is σ = 18867200. Its totient is φ = 6896448.

The previous prime is 12225149. The next prime is 12225179. The reversal of 12225171 is 17152221.

12225171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12225171 - 2⁶ = 12225107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12225179) 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, 2026 + ... + 5343.

It is an arithmetic number, because the mean of its divisors is an integer number (1179200).

Almost surely, 2^12225171 is an apocalyptic number.

12225171 is a deficient number, since it is larger than the sum of its proper divisors (6642029).

12225171 is an equidigital number, since it uses as much as digits as its factorization.

12225171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7458.

The product of its digits is 280, while the sum is 21.

The square root of 12225171 is about 3496.4512008607. The cubic root of 12225171 is about 230.3659643312.

Adding to 12225171 its reverse (17152221), we get a palindrome (29377392).

The spelling of 12225171 in words is "twelve million, two hundred twenty-five thousand, one hundred seventy-one".