442112321 has 4 divisors (see below), whose sum is σ = 505271232. Its totient is φ = 378953412.

The previous prime is 442112291. The next prime is 442112327. The reversal of 442112321 is 123211244.

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 442112321 - 2⁶ = 442112257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442112293 and 442112302.

It is not an unprimeable number, because it can be changed into a prime (442112327) 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, 31579445 + ... + 31579458.

It is an arithmetic number, because the mean of its divisors is an integer number (126317808).

Almost surely, 2^442112321 is an apocalyptic number.

It is an amenable number.

442112321 is a deficient number, since it is larger than the sum of its proper divisors (63158911).

442112321 is an equidigital number, since it uses as much as digits as its factorization.

442112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63158910.

The product of its digits is 384, while the sum is 20.

The square root of 442112321 is about 21026.4671545174. The cubic root of 442112321 is about 761.8056793760.

Adding to 442112321 its reverse (123211244), we get a palindrome (565323565).

The spelling of 442112321 in words is "four hundred forty-two million, one hundred twelve thousand, three hundred twenty-one".