12042739 has 2 divisors, whose sum is σ = 12042740. Its totient is φ = 12042738.

The previous prime is 12042721. The next prime is 12042761. The reversal of 12042739 is 93724021.

It is a weak prime.

It is an emirp because it is prime and its reverse (93724021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12042739 - 2⁵ = 12042707 is a prime.

It is not a weakly prime, because it can be changed into another prime (12042769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6021369 + 6021370.

It is an arithmetic number, because the mean of its divisors is an integer number (6021370).

Almost surely, 2^12042739 is an apocalyptic number.

12042739 is a deficient number, since it is larger than the sum of its proper divisors (1).

12042739 is an equidigital number, since it uses as much as digits as its factorization.

12042739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 12042739 is about 3470.2649754738. The cubic root of 12042739 is about 229.2143261464.

The spelling of 12042739 in words is "twelve million, forty-two thousand, seven hundred thirty-nine".