12768405 has 16 divisors (see below), whose sum is σ = 22001280. Its totient is φ = 6285888.

The previous prime is 12768383. The next prime is 12768419. The reversal of 12768405 is 50486721.

It is not a de Polignac number, because 12768405 - 2⁶ = 12768341 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 32545 + ... + 32934.

It is an arithmetic number, because the mean of its divisors is an integer number (1375080).

Almost surely, 2^12768405 is an apocalyptic number.

12768405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12768405 is a deficient number, since it is larger than the sum of its proper divisors (9232875).

12768405 is a wasteful number, since it uses less digits than its factorization.

12768405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65500.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 12768405 is about 3573.2905003652. The cubic root of 12768405 is about 233.7287931040.

The spelling of 12768405 in words is "twelve million, seven hundred sixty-eight thousand, four hundred five".