4021443 has 6 divisors (see below), whose sum is σ = 5808764. Its totient is φ = 2680956.

The previous prime is 4021439. The next prime is 4021447. The reversal of 4021443 is 3441204.

It is an interprime number because it is at equal distance from previous prime (4021439) and next prime (4021447).

It is not a de Polignac number, because 4021443 - 2² = 4021439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021447) 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 in 5 ways as a sum of consecutive naturals, for example, 223405 + ... + 223422.

Almost surely, 2^4021443 is an apocalyptic number.

4021443 is a deficient number, since it is larger than the sum of its proper divisors (1787321).

4021443 is a wasteful number, since it uses less digits than its factorization.

4021443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446833 (or 446830 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4021443 is about 2005.3535847825. The cubic root of 4021443 is about 159.0232551722.

Adding to 4021443 its reverse (3441204), we get a palindrome (7462647).

The spelling of 4021443 in words is "four million, twenty-one thousand, four hundred forty-three".