12228739 has 2 divisors, whose sum is σ = 12228740. Its totient is φ = 12228738.

The previous prime is 12228721. The next prime is 12228751. The reversal of 12228739 is 93782221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12228739 - 2⁵ = 12228707 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (12228239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6114369 + 6114370.

It is an arithmetic number, because the mean of its divisors is an integer number (6114370).

Almost surely, 2^12228739 is an apocalyptic number.

12228739 is a deficient number, since it is larger than the sum of its proper divisors (1).

12228739 is an equidigital number, since it uses as much as digits as its factorization.

12228739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 12228739 is about 3496.9613952688. The cubic root of 12228739 is about 230.3883734468.

The spelling of 12228739 in words is "twelve million, two hundred twenty-eight thousand, seven hundred thirty-nine".