4021243 has 2 divisors, whose sum is σ = 4021244. Its totient is φ = 4021242.

The previous prime is 4021229. The next prime is 4021247. The reversal of 4021243 is 3421204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4021243 - 2⁵ = 4021211 is a prime.

4021243 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4021247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010621 + 2010622.

It is an arithmetic number, because the mean of its divisors is an integer number (2010622).

Almost surely, 2^4021243 is an apocalyptic number.

4021243 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021243 is an equidigital number, since it uses as much as digits as its factorization.

4021243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 4021243 is about 2005.3037176448. The cubic root of 4021243 is about 159.0206188732.

Adding to 4021243 its reverse (3421204), we get a palindrome (7442447).

The spelling of 4021243 in words is "four million, twenty-one thousand, two hundred forty-three".