12139642 has 8 divisors (see below), whose sum is σ = 18238176. Its totient is φ = 6060252.

The previous prime is 12139637. The next prime is 12139679. The reversal of 12139642 is 24693121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12139642.

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, 3078 + ... + 5809.

It is an arithmetic number, because the mean of its divisors is an integer number (2279772).

Almost surely, 2^12139642 is an apocalyptic number.

12139642 is a deficient number, since it is larger than the sum of its proper divisors (6098534).

12139642 is an equidigital number, since it uses as much as digits as its factorization.

12139642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9572.

The product of its digits is 2592, while the sum is 28.

The square root of 12139642 is about 3484.1989036219. The cubic root of 12139642 is about 229.8274824773.

The spelling of 12139642 in words is "twelve million, one hundred thirty-nine thousand, six hundred forty-two".