12128039 has 12 divisors (see below), whose sum is σ = 15391368. Its totient is φ = 9450000.

The previous prime is 12128027. The next prime is 12128059. The reversal of 12128039 is 93082121.

It is not a de Polignac number, because 12128039 - 2²⁰ = 11079463 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12127999 and 12128017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12128009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10712 + ... + 11789.

It is an arithmetic number, because the mean of its divisors is an integer number (1282614).

Almost surely, 2^12128039 is an apocalyptic number.

12128039 is a deficient number, since it is larger than the sum of its proper divisors (3263329).

12128039 is a wasteful number, since it uses less digits than its factorization.

12128039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22526 (or 22519 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 12128039 is about 3482.5334169251. The cubic root of 12128039 is about 229.7542365411.

The spelling of 12128039 in words is "twelve million, one hundred twenty-eight thousand, thirty-nine".