12342439 has 4 divisors (see below), whose sum is σ = 12349480. Its totient is φ = 12335400.

The previous prime is 12342437. The next prime is 12342461. The reversal of 12342439 is 93424321.

12342439 = T₂₈₆₇ + T₂₈₆₈ + T₂₈₆₉.

12342439 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93424321 = 23 ⋅4061927.

It is a cyclic number.

It is not a de Polignac number, because 12342439 - 2¹ = 12342437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12342437) 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 in 3 ways as a sum of consecutive naturals, for example, 1432 + ... + 5170.

It is an arithmetic number, because the mean of its divisors is an integer number (3087370).

Almost surely, 2^12342439 is an apocalyptic number.

12342439 is the 2869-th centered triangular number.

12342439 is a deficient number, since it is larger than the sum of its proper divisors (7041).

12342439 is an equidigital number, since it uses as much as digits as its factorization.

12342439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7040.

The product of its digits is 5184, while the sum is 28.

The square root of 12342439 is about 3513.1807525375. The cubic root of 12342439 is about 231.1002045228.

The spelling of 12342439 in words is "twelve million, three hundred forty-two thousand, four hundred thirty-nine".