12139618 has 8 divisors (see below), whose sum is σ = 18229248. Its totient is φ = 6063204.

The previous prime is 12139609. The next prime is 12139619. The reversal of 12139618 is 81693121.

12139618 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 self number, because there is not a number n which added to its sum of digits gives 12139618.

It is not an unprimeable number, because it can be changed into a prime (12139619) 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, 546 + ... + 4957.

It is an arithmetic number, because the mean of its divisors is an integer number (2278656).

Almost surely, 2^12139618 is an apocalyptic number.

12139618 is a deficient number, since it is larger than the sum of its proper divisors (6089630).

12139618 is a wasteful number, since it uses less digits than its factorization.

12139618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6608.

The product of its digits is 2592, while the sum is 31.

The square root of 12139618 is about 3484.1954594999. The cubic root of 12139618 is about 229.8273310214.

The spelling of 12139618 in words is "twelve million, one hundred thirty-nine thousand, six hundred eighteen".