4042003421 has 4 divisors (see below), whose sum is σ = 4066801152. Its totient is φ = 4017205692.

The previous prime is 4042003373. The next prime is 4042003423. The reversal of 4042003421 is 1243002404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4042003421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4042003393 and 4042003402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042003423) 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, 12398621 + ... + 12398946.

It is an arithmetic number, because the mean of its divisors is an integer number (1016700288).

Almost surely, 2^4042003421 is an apocalyptic number.

It is an amenable number.

4042003421 is a deficient number, since it is larger than the sum of its proper divisors (24797731).

4042003421 is a wasteful number, since it uses less digits than its factorization.

4042003421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24797730.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4042003421 is about 63576.7522055035. The cubic root of 4042003421 is about 1592.9380720334.

Adding to 4042003421 its reverse (1243002404), we get a palindrome (5285005825).

The spelling of 4042003421 in words is "four billion, forty-two million, three thousand, four hundred twenty-one".