12078139 has 2 divisors, whose sum is σ = 12078140. Its totient is φ = 12078138.

The previous prime is 12078103. The next prime is 12078161. The reversal of 12078139 is 93187021.

12078139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (93187021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12078139 - 2¹¹ = 12076091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12078139.

It is not a weakly prime, because it can be changed into another prime (12078439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6039069 + 6039070.

It is an arithmetic number, because the mean of its divisors is an integer number (6039070).

Almost surely, 2^12078139 is an apocalyptic number.

12078139 is a deficient number, since it is larger than the sum of its proper divisors (1).

12078139 is an equidigital number, since it uses as much as digits as its factorization.

12078139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 12078139 is about 3475.3617077939. The cubic root of 12078139 is about 229.4387006144.

The spelling of 12078139 in words is "twelve million, seventy-eight thousand, one hundred thirty-nine".