12429239 has 4 divisors (see below), whose sum is σ = 12505656. Its totient is φ = 12352824.

The previous prime is 12429229. The next prime is 12429247. The reversal of 12429239 is 93292421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93292421 = 3299 ⋅28279.

It is a cyclic number.

It is not a de Polignac number, because 12429239 - 2¹² = 12425143 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 (12429229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37964 + ... + 38289.

It is an arithmetic number, because the mean of its divisors is an integer number (3126414).

Almost surely, 2^12429239 is an apocalyptic number.

12429239 is a deficient number, since it is larger than the sum of its proper divisors (76417).

12429239 is an equidigital number, since it uses as much as digits as its factorization.

12429239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76416.

The product of its digits is 7776, while the sum is 32.

The square root of 12429239 is about 3525.5125868446. The cubic root of 12429239 is about 231.6406881025.

The spelling of 12429239 in words is "twelve million, four hundred twenty-nine thousand, two hundred thirty-nine".