12139212 has 12 divisors (see below), whose sum is σ = 28324856. Its totient is φ = 4046400.

The previous prime is 12139189. The next prime is 12139229. The reversal of 12139212 is 21293121.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505789 + ... + 505812.

Almost surely, 2^12139212 is an apocalyptic number.

12139212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12139212 is an abundant number, since it is smaller than the sum of its proper divisors (16185644).

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

12139212 is a wasteful number, since it uses less digits than its factorization.

12139212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011608 (or 1011606 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

The square root of 12139212 is about 3484.1371959210. The cubic root of 12139212 is about 229.8247688612.

The spelling of 12139212 in words is "twelve million, one hundred thirty-nine thousand, two hundred twelve".