4042423 has 16 divisors (see below), whose sum is σ = 5151744. Its totient is φ = 3080160.

The previous prime is 4042417. The next prime is 4042427. The reversal of 4042423 is 3242404.

It is a cyclic number.

It is not a de Polignac number, because 4042423 - 2⁵ = 4042391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4042423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3061 + ... + 4177.

It is an arithmetic number, because the mean of its divisors is an integer number (321984).

Almost surely, 2^4042423 is an apocalyptic number.

4042423 is a deficient number, since it is larger than the sum of its proper divisors (1109321).

4042423 is a wasteful number, since it uses less digits than its factorization.

4042423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 4042423 is about 2010.5777776550. The cubic root of 4042423 is about 159.2993188285.

Subtracting from 4042423 its sum of digits (19), we obtain a palindrome (4042404).

Adding to 4042423 its reverse (3242404), we get a palindrome (7284827).

It can be divided in two parts, 4042 and 423, that added together give a triangular number (4465 = T₉₄).

The spelling of 4042423 in words is "four million, forty-two thousand, four hundred twenty-three".