42605243 has 2 divisors, whose sum is σ = 42605244. Its totient is φ = 42605242.

The previous prime is 42605237. The next prime is 42605249. The reversal of 42605243 is 34250624.

42605243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (42605237) and next prime (42605249).

It is a cyclic number.

It is not a de Polignac number, because 42605243 - 2¹² = 42601147 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42605249) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21302621 + 21302622.

It is an arithmetic number, because the mean of its divisors is an integer number (21302622).

Almost surely, 2^42605243 is an apocalyptic number.

42605243 is a deficient number, since it is larger than the sum of its proper divisors (1).

42605243 is an equidigital number, since it uses as much as digits as its factorization.

42605243 is an odious number, because the sum of its binary digits is odd.

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

The square root of 42605243 is about 6527.2691839697. The cubic root of 42605243 is about 349.2644225035.

Adding to 42605243 its reverse (34250624), we get a palindrome (76855867).

The spelling of 42605243 in words is "forty-two million, six hundred five thousand, two hundred forty-three".