4030042 has 4 divisors (see below), whose sum is σ = 6045066. Its totient is φ = 2015020.

The previous prime is 4030007. The next prime is 4030051. The reversal of 4030042 is 2400304.

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

It can be written as a sum of positive squares in only one way, i.e., 2368521 + 1661521 = 1539^2 + 1289^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007509 + ... + 1007512.

Almost surely, 2^4030042 is an apocalyptic number.

4030042 is a deficient number, since it is larger than the sum of its proper divisors (2015024).

4030042 is a wasteful number, since it uses less digits than its factorization.

4030042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015023.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 4030042 is about 2007.4964508063. The cubic root of 4030042 is about 159.1365202752.

Adding to 4030042 its reverse (2400304), we get a palindrome (6430346).

The spelling of 4030042 in words is "four million, thirty thousand, forty-two", and thus it is an eban number.