12225156 has 12 divisors (see below), whose sum is σ = 28525392. Its totient is φ = 4075048.

The previous prime is 12225149. The next prime is 12225179. The reversal of 12225156 is 65152221.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509370 + ... + 509393.

It is an arithmetic number, because the mean of its divisors is an integer number (2377116).

Almost surely, 2^12225156 is an apocalyptic number.

It is an amenable number.

12225156 is an abundant number, since it is smaller than the sum of its proper divisors (16300236).

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

12225156 is a wasteful number, since it uses less digits than its factorization.

12225156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018770 (or 1018768 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 12225156 is about 3496.4490558279. The cubic root of 12225156 is about 230.3658701133.

Adding to 12225156 its reverse (65152221), we get a palindrome (77377377).

The spelling of 12225156 in words is "twelve million, two hundred twenty-five thousand, one hundred fifty-six".