12123239 has 2 divisors, whose sum is σ = 12123240. Its totient is φ = 12123238.

The previous prime is 12123217. The next prime is 12123253. The reversal of 12123239 is 93232121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12123239 - 2⁸ = 12122983 is a prime.

It is a super-2 number, since 2×12123239² = 293945847702242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12123299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061619 + 6061620.

It is an arithmetic number, because the mean of its divisors is an integer number (6061620).

Almost surely, 2^12123239 is an apocalyptic number.

12123239 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123239 is an equidigital number, since it uses as much as digits as its factorization.

12123239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 12123239 is about 3481.8441952506. The cubic root of 12123239 is about 229.7239220536.

The spelling of 12123239 in words is "twelve million, one hundred twenty-three thousand, two hundred thirty-nine".