12105228 has 24 divisors (see below), whose sum is σ = 28365120. Its totient is φ = 4018000.

The previous prime is 12105211. The next prime is 12105271. The reversal of 12105228 is 82250121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1003 + ... + 5021.

It is an arithmetic number, because the mean of its divisors is an integer number (1181880).

Almost surely, 2^12105228 is an apocalyptic number.

It is an amenable number.

12105228 is an abundant number, since it is smaller than the sum of its proper divisors (16259892).

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

12105228 is a wasteful number, since it uses less digits than its factorization.

12105228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4277 (or 4275 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 12105228 is about 3479.2568171953. The cubic root of 12105228 is about 229.6101018594.

Adding to 12105228 its reverse (82250121), we get a palindrome (94355349).

The spelling of 12105228 in words is "twelve million, one hundred five thousand, two hundred twenty-eight".