12049139 has 4 divisors (see below), whose sum is σ = 12062520. Its totient is φ = 12035760.

The previous prime is 12049133. The next prime is 12049151. The reversal of 12049139 is 93194021.

It is a happy number.

12049139 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12049139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12049133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5234 + ... + 7175.

It is an arithmetic number, because the mean of its divisors is an integer number (3015630).

Almost surely, 2^12049139 is an apocalyptic number.

12049139 is a deficient number, since it is larger than the sum of its proper divisors (13381).

12049139 is an equidigital number, since it uses as much as digits as its factorization.

12049139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13380.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 12049139 is about 3471.1869727803. The cubic root of 12049139 is about 229.2549235524.

The spelling of 12049139 in words is "twelve million, forty-nine thousand, one hundred thirty-nine".