12139906 has 8 divisors (see below), whose sum is σ = 19001664. Its totient is φ = 5806020.

The previous prime is 12139891. The next prime is 12139913. The reversal of 12139906 is 60993121.

12139906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 131910 + ... + 132001.

It is an arithmetic number, because the mean of its divisors is an integer number (2375208).

Almost surely, 2^12139906 is an apocalyptic number.

12139906 is a deficient number, since it is larger than the sum of its proper divisors (6861758).

12139906 is a wasteful number, since it uses less digits than its factorization.

12139906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263936.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 12139906 is about 3484.2367887387. The cubic root of 12139906 is about 229.8291484796.

The spelling of 12139906 in words is "twelve million, one hundred thirty-nine thousand, nine hundred six".