4042320421 has 8 divisors (see below), whose sum is σ = 4161941784. Its totient is φ = 3923700480.

The previous prime is 4042320419. The next prime is 4042320437. The reversal of 4042320421 is 1240232404.

It is a happy number.

4042320421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1347257025 + 2695063396 = 36705^2 + 51914^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4042320421 - 2¹ = 4042320419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4042320392 and 4042320401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042320521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242160 + ... + 258313.

It is an arithmetic number, because the mean of its divisors is an integer number (520242723).

Almost surely, 2^4042320421 is an apocalyptic number.

4042320421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4042320421 is a deficient number, since it is larger than the sum of its proper divisors (119621363).

4042320421 is a wasteful number, since it uses less digits than its factorization.

4042320421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500711.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4042320421 is about 63579.2452062778. The cubic root of 4042320421 is about 1592.9797137736.

Adding to 4042320421 its reverse (1240232404), we get a palindrome (5282552825).

The spelling of 4042320421 in words is "four billion, forty-two million, three hundred twenty thousand, four hundred twenty-one".