6542243 has 2 divisors, whose sum is σ = 6542244. Its totient is φ = 6542242.

The previous prime is 6542219. The next prime is 6542257. The reversal of 6542243 is 3422456.

6542243 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6542243 is a prime.

It is not a weakly prime, because it can be changed into another prime (6542293) 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, 3271121 + 3271122.

It is an arithmetic number, because the mean of its divisors is an integer number (3271122).

Almost surely, 2^6542243 is an apocalyptic number.

6542243 is a deficient number, since it is larger than the sum of its proper divisors (1).

6542243 is an equidigital number, since it uses as much as digits as its factorization.

6542243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 26.

The square root of 6542243 is about 2557.7808741172. The cubic root of 6542243 is about 187.0289735579.

Adding to 6542243 its reverse (3422456), we get a palindrome (9964699).

The spelling of 6542243 in words is "six million, five hundred forty-two thousand, two hundred forty-three".