12126839 has 2 divisors, whose sum is σ = 12126840. Its totient is φ = 12126838.

The previous prime is 12126791. The next prime is 12126841. The reversal of 12126839 is 93862121.

It is a strong prime.

It is an emirp because it is prime and its reverse (93862121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12126839 is a prime.

Together with 12126841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12126869) 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 as a sum of consecutive naturals, namely, 6063419 + 6063420.

It is an arithmetic number, because the mean of its divisors is an integer number (6063420).

Almost surely, 2^12126839 is an apocalyptic number.

12126839 is a deficient number, since it is larger than the sum of its proper divisors (1).

12126839 is an equidigital number, since it uses as much as digits as its factorization.

12126839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 12126839 is about 3482.3611242948. The cubic root of 12126839 is about 229.7466586692.

The spelling of 12126839 in words is "twelve million, one hundred twenty-six thousand, eight hundred thirty-nine".