442321 has 8 divisors (see below), whose sum is σ = 489600. Its totient is φ = 396240.

The previous prime is 442319. The next prime is 442327. The reversal of 442321 is 123244.

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 442321 - 2¹ = 442319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442295 and 442304.

It is not an unprimeable number, because it can be changed into a prime (442327) 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 7 ways as a sum of consecutive naturals, for example, 615 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (61200).

2⁴⁴²³²¹ is an apocalyptic number.

It is an amenable number.

442321 is a deficient number, since it is larger than the sum of its proper divisors (47279).

442321 is a wasteful number, since it uses less digits than its factorization.

442321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599.

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

The square root of 442321 is about 665.0721765342. The cubic root of 442321 is about 76.1925519090.

Adding to 442321 its reverse (123244), we get a palindrome (565565).

It can be divided in two parts, 4423 and 21, that added together give a palindrome (4444).

The spelling of 442321 in words is "four hundred forty-two thousand, three hundred twenty-one", and thus it is an iban number.