442242321 has 32 divisors (see below), whose sum is σ = 627179520. Its totient is φ = 276623424.

The previous prime is 442242319. The next prime is 442242341. The reversal of 442242321 is 123242244.

It is not a de Polignac number, because 442242321 - 2¹ = 442242319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442242291 and 442242300.

It is not an unprimeable number, because it can be changed into a prime (442242341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 954936 + ... + 955398.

It is an arithmetic number, because the mean of its divisors is an integer number (19599360).

Almost surely, 2^442242321 is an apocalyptic number.

It is an amenable number.

442242321 is a deficient number, since it is larger than the sum of its proper divisors (184937199).

442242321 is a wasteful number, since it uses less digits than its factorization.

442242321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its digits is 3072, while the sum is 24.

The square root of 442242321 is about 21029.5582692552. The cubic root of 442242321 is about 761.8803399154.

Adding to 442242321 its reverse (123242244), we get a palindrome (565484565).

The spelling of 442242321 in words is "four hundred forty-two million, two hundred forty-two thousand, three hundred twenty-one".