4042231421 has 4 divisors (see below), whose sum is σ = 4043543100. Its totient is φ = 4040919744.

The previous prime is 4042231411. The next prime is 4042231447. The reversal of 4042231421 is 1241322404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2993184100 + 1049047321 = 54710^2 + 32389^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042231421 - 2¹⁰ = 4042230397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042231411) 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, 651206 + ... + 657383.

It is an arithmetic number, because the mean of its divisors is an integer number (1010885775).

Almost surely, 2^4042231421 is an apocalyptic number.

It is an amenable number.

4042231421 is a deficient number, since it is larger than the sum of its proper divisors (1311679).

4042231421 is a wasteful number, since it uses less digits than its factorization.

4042231421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311678.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 4042231421 is about 63578.5452884855. The cubic root of 4042231421 is about 1592.9680227793.

Adding to 4042231421 its reverse (1241322404), we get a palindrome (5283553825).

The spelling of 4042231421 in words is "four billion, forty-two million, two hundred thirty-one thousand, four hundred twenty-one".