12768021 has 12 divisors (see below), whose sum is σ = 21077472. Its totient is φ = 7295976.

The previous prime is 12767987. The next prime is 12768023. The reversal of 12768021 is 12086721.

It is not a de Polignac number, because 12768021 - 2⁶ = 12767957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12768023) 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 11 ways as a sum of consecutive naturals, for example, 101271 + ... + 101396.

It is an arithmetic number, because the mean of its divisors is an integer number (1756456).

Almost surely, 2^12768021 is an apocalyptic number.

It is an amenable number.

12768021 is a deficient number, since it is larger than the sum of its proper divisors (8309451).

12768021 is a wasteful number, since it uses less digits than its factorization.

12768021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202680 (or 202677 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 12768021 is about 3573.2367679738. The cubic root of 12768021 is about 233.7264500091.

The spelling of 12768021 in words is "twelve million, seven hundred sixty-eight thousand, twenty-one".