12139558 has 8 divisors (see below), whose sum is σ = 18224280. Its totient is φ = 6064800.

The previous prime is 12139541. The next prime is 12139559. The reversal of 12139558 is 85593121.

12139558 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12139559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2833 + ... + 5683.

It is an arithmetic number, because the mean of its divisors is an integer number (2278035).

Almost surely, 2^12139558 is an apocalyptic number.

12139558 is a deficient number, since it is larger than the sum of its proper divisors (6084722).

12139558 is a wasteful number, since it uses less digits than its factorization.

12139558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4982.

The product of its digits is 10800, while the sum is 34.

The square root of 12139558 is about 3484.1868491802. The cubic root of 12139558 is about 229.8269523806.

The spelling of 12139558 in words is "twelve million, one hundred thirty-nine thousand, five hundred fifty-eight".