12429939 has 16 divisors (see below), whose sum is σ = 16934400. Its totient is φ = 8108256.

The previous prime is 12429889. The next prime is 12429947. The reversal of 12429939 is 93992421.

It is not a de Polignac number, because 12429939 - 2⁷ = 12429811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12429897 and 12429906.

It is not an unprimeable number, because it can be changed into a prime (12425939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42277 + ... + 42569.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^12429939 is an apocalyptic number.

12429939 is a deficient number, since it is larger than the sum of its proper divisors (4504461).

12429939 is a wasteful number, since it uses less digits than its factorization.

12429939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554.

The product of its digits is 34992, while the sum is 39.

The square root of 12429939 is about 3525.6118617908. The cubic root of 12429939 is about 231.6450365971.

The spelling of 12429939 in words is "twelve million, four hundred twenty-nine thousand, nine hundred thirty-nine".