4243243 has 2 divisors, whose sum is σ = 4243244. Its totient is φ = 4243242.

The previous prime is 4243237. The next prime is 4243279. The reversal of 4243243 is 3423424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4243243 - 2²¹ = 2146091 is a prime.

It is a super-2 number, since 2×4243243² = 36010222314098, which contains 22 as substring.

It is an Ulam number.

4243243 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4243543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121621 + 2121622.

It is an arithmetic number, because the mean of its divisors is an integer number (2121622).

Almost surely, 2^4243243 is an apocalyptic number.

4243243 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243243 is an equidigital number, since it uses as much as digits as its factorization.

4243243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 22.

The square root of 4243243 is about 2059.9133476921. The cubic root of 4243243 is about 161.8947011695.

Adding to 4243243 its reverse (3423424), we get a palindrome (7666667).

The spelling of 4243243 in words is "four million, two hundred forty-three thousand, two hundred forty-three".