12142188 has 18 divisors (see below), whose sum is σ = 30692844. Its totient is φ = 4047384.

The previous prime is 12142177. The next prime is 12142217. The reversal of 12142188 is 88124121.

12142188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168606 + ... + 168677.

It is an arithmetic number, because the mean of its divisors is an integer number (1705158).

Almost surely, 2^12142188 is an apocalyptic number.

12142188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12142188 is an abundant number, since it is smaller than the sum of its proper divisors (18550656).

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

12142188 is a wasteful number, since it uses less digits than its factorization.

12142188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337293 (or 337288 counting only the distinct ones).

The product of its digits is 1024, while the sum is 27.

The square root of 12142188 is about 3484.5642482239. The cubic root of 12142188 is about 229.8435482962.

The spelling of 12142188 in words is "twelve million, one hundred forty-two thousand, one hundred eighty-eight".