12165139 has 8 divisors (see below), whose sum is σ = 13927680. Its totient is φ = 10408776.

The previous prime is 12165133. The next prime is 12165161. The reversal of 12165139 is 93156121.

12165139 is digitally balanced in base 3, 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 not a de Polignac number, because 12165139 - 2⁵ = 12165107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12165133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4032 + ... + 6370.

It is an arithmetic number, because the mean of its divisors is an integer number (1740960).

Almost surely, 2^12165139 is an apocalyptic number.

12165139 is a deficient number, since it is larger than the sum of its proper divisors (1762541).

12165139 is an equidigital number, since it uses as much as digits as its factorization.

12165139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089.

The product of its digits is 1620, while the sum is 28.

The square root of 12165139 is about 3487.8559316577. The cubic root of 12165139 is about 229.9882728740.

The spelling of 12165139 in words is "twelve million, one hundred sixty-five thousand, one hundred thirty-nine".