12821843 has 2 divisors, whose sum is σ = 12821844. Its totient is φ = 12821842.

The previous prime is 12821803. The next prime is 12821891. The reversal of 12821843 is 34812821.

12821843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12821843 - 2¹⁴ = 12805459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12821803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6410921 + 6410922.

It is an arithmetic number, because the mean of its divisors is an integer number (6410922).

Almost surely, 2^12821843 is an apocalyptic number.

12821843 is a deficient number, since it is larger than the sum of its proper divisors (1).

12821843 is an equidigital number, since it uses as much as digits as its factorization.

12821843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 29.

The square root of 12821843 is about 3580.7601148360. The cubic root of 12821843 is about 234.0544045220.

It can be divided in two parts, 1282 and 1843, that added together give a 5-th power (3125 = 5⁵).

The spelling of 12821843 in words is "twelve million, eight hundred twenty-one thousand, eight hundred forty-three".