12439205 has 16 divisors (see below), whose sum is σ = 16398720. Its totient is φ = 9016128.

The previous prime is 12439199. The next prime is 12439211. The reversal of 12439205 is 50293421.

It is an interprime number because it is at equal distance from previous prime (12439199) and next prime (12439211).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12439205 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662 + ... + 5031.

It is an arithmetic number, because the mean of its divisors is an integer number (1024920).

Almost surely, 2^12439205 is an apocalyptic number.

It is an amenable number.

12439205 is a deficient number, since it is larger than the sum of its proper divisors (3959515).

12439205 is a wasteful number, since it uses less digits than its factorization.

12439205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 12439205 is about 3526.9257151236. The cubic root of 12439205 is about 231.7025828643.

The spelling of 12439205 in words is "twelve million, four hundred thirty-nine thousand, two hundred five".