12820043 has 2 divisors, whose sum is σ = 12820044. Its totient is φ = 12820042.

The previous prime is 12820037. The next prime is 12820061. The reversal of 12820043 is 34002821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12820043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12819997 and 12820024.

It is not a weakly prime, because it can be changed into another prime (12820033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6410021 + 6410022.

It is an arithmetic number, because the mean of its divisors is an integer number (6410022).

Almost surely, 2^12820043 is an apocalyptic number.

12820043 is a deficient number, since it is larger than the sum of its proper divisors (1).

12820043 is an equidigital number, since it uses as much as digits as its factorization.

12820043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 12820043 is about 3580.5087627319. The cubic root of 12820043 is about 234.0434513997.

Adding to 12820043 its reverse (34002821), we get a palindrome (46822864).

The spelling of 12820043 in words is "twelve million, eight hundred twenty thousand, forty-three".