12804385 has 16 divisors (see below), whose sum is σ = 17645760. Its totient is φ = 8821440.

The previous prime is 12804377. The next prime is 12804397. The reversal of 12804385 is 58340821.

It is not a de Polignac number, because 12804385 - 2³ = 12804377 is a prime.

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, 5082 + ... + 7171.

It is an arithmetic number, because the mean of its divisors is an integer number (1102860).

Almost surely, 2^12804385 is an apocalyptic number.

It is an amenable number.

12804385 is a deficient number, since it is larger than the sum of its proper divisors (4841375).

12804385 is a wasteful number, since it uses less digits than its factorization.

12804385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12288.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 12804385 is about 3578.3215339038. The cubic root of 12804385 is about 233.9481281277.

It can be divided in two parts, 1280 and 4385, that added together give a palindrome (5665).

The spelling of 12804385 in words is "twelve million, eight hundred four thousand, three hundred eighty-five".