4042321 has 4 divisors (see below), whose sum is σ = 4060672. Its totient is φ = 4023972.

The previous prime is 4042309. The next prime is 4042327. The reversal of 4042321 is 1232404.

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 not a de Polignac number, because 4042321 - 2¹⁷ = 3911249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4042295 and 4042304.

It is not an unprimeable number, because it can be changed into a prime (4042327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8841 + ... + 9286.

It is an arithmetic number, because the mean of its divisors is an integer number (1015168).

Almost surely, 2^4042321 is an apocalyptic number.

It is an amenable number.

4042321 is a deficient number, since it is larger than the sum of its proper divisors (18351).

4042321 is a wasteful number, since it uses less digits than its factorization.

4042321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18350.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 4042321 is about 2010.5524116521. The cubic root of 4042321 is about 159.2979789830.

Adding to 4042321 its reverse (1232404), we get a palindrome (5274725).

The spelling of 4042321 in words is "four million, forty-two thousand, three hundred twenty-one".