12155228 has 12 divisors (see below), whose sum is σ = 21434952. Its totient is φ = 6030960.

The previous prime is 12155191. The next prime is 12155237. The reversal of 12155228 is 82255121.

It is a junction number, because it is equal to n+sod(n) for n = 12155197 and 12155206.

It is a congruent number.

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, 11075 + ... + 12122.

It is an arithmetic number, because the mean of its divisors is an integer number (1786246).

Almost surely, 2^12155228 is an apocalyptic number.

It is an amenable number.

12155228 is a deficient number, since it is larger than the sum of its proper divisors (9279724).

12155228 is a wasteful number, since it uses less digits than its factorization.

12155228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23332 (or 23330 counting only the distinct ones).

The product of its digits is 1600, while the sum is 26.

The square root of 12155228 is about 3486.4348552640. The cubic root of 12155228 is about 229.9257983702.

The spelling of 12155228 in words is "twelve million, one hundred fifty-five thousand, two hundred twenty-eight".