4042443 has 4 divisors (see below), whose sum is σ = 5389928. Its totient is φ = 2694960.

The previous prime is 4042433. The next prime is 4042463. The reversal of 4042443 is 3442404.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4042443 - 2⁴ = 4042427 is a prime.

It is a D-number.

It is a Duffinian number.

4042443 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4042433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673738 + ... + 673743.

It is an arithmetic number, because the mean of its divisors is an integer number (1347482).

Almost surely, 2^4042443 is an apocalyptic number.

4042443 is a deficient number, since it is larger than the sum of its proper divisors (1347485).

4042443 is a wasteful number, since it uses less digits than its factorization.

4042443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347484.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 4042443 is about 2010.5827513435. The cubic root of 4042443 is about 159.2995815407.

Adding to 4042443 its reverse (3442404), we get a palindrome (7484847).

The spelling of 4042443 in words is "four million, forty-two thousand, four hundred forty-three".