12439605 has 32 divisors (see below), whose sum is σ = 20684160. Its totient is φ = 6379520.

The previous prime is 12439601. The next prime is 12439607. The reversal of 12439605 is 50693421.

It is not a de Polignac number, because 12439605 - 2² = 12439601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12439601) 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 31 ways as a sum of consecutive naturals, for example, 69406 + ... + 69584.

It is an arithmetic number, because the mean of its divisors is an integer number (646380).

Almost surely, 2^12439605 is an apocalyptic number.

12439605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12439605 is a deficient number, since it is larger than the sum of its proper divisors (8244555).

12439605 is a wasteful number, since it uses less digits than its factorization.

12439605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 12439605 is about 3526.9824212774. The cubic root of 12439605 is about 231.7050664110.

The spelling of 12439605 in words is "twelve million, four hundred thirty-nine thousand, six hundred five".