12805418 has 16 divisors (see below), whose sum is σ = 20113920. Its totient is φ = 6106800.

The previous prime is 12805417. The next prime is 12805421. The reversal of 12805418 is 81450821.

It is not an unprimeable number, because it can be changed into a prime (12805417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2948 + ... + 5856.

It is an arithmetic number, because the mean of its divisors is an integer number (1257120).

Almost surely, 2^12805418 is an apocalyptic number.

12805418 is a deficient number, since it is larger than the sum of its proper divisors (7308502).

12805418 is a wasteful number, since it uses less digits than its factorization.

12805418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 12805418 is about 3578.4658724096. The cubic root of 12805418 is about 233.9544192516.

The spelling of 12805418 in words is "twelve million, eight hundred five thousand, four hundred eighteen".