12429905 has 8 divisors (see below), whose sum is σ = 14934912. Its totient is φ = 9931248.

The previous prime is 12429889. The next prime is 12429947. The reversal of 12429905 is 50992421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12429905 - 2⁴ = 12429889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6242 + ... + 7988.

It is an arithmetic number, because the mean of its divisors is an integer number (1866864).

Almost surely, 2^12429905 is an apocalyptic number.

It is an amenable number.

12429905 is a deficient number, since it is larger than the sum of its proper divisors (2505007).

12429905 is a wasteful number, since it uses less digits than its factorization.

12429905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3175.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 12429905 is about 3525.6070399294. The cubic root of 12429905 is about 231.6448253883.

The spelling of 12429905 in words is "twelve million, four hundred twenty-nine thousand, nine hundred five".