442100321 has 8 divisors (see below), whose sum is σ = 476624064. Its totient is φ = 407650320.

The previous prime is 442100299. The next prime is 442100327. The reversal of 442100321 is 123001244.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442100321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442100321.

It is not an unprimeable number, because it can be changed into a prime (442100327) 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, 5645 + ... + 30266.

It is an arithmetic number, because the mean of its divisors is an integer number (59578008).

Almost surely, 2^442100321 is an apocalyptic number.

It is an amenable number.

442100321 is a deficient number, since it is larger than the sum of its proper divisors (34523743).

442100321 is a wasteful number, since it uses less digits than its factorization.

442100321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36871.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 442100321 is about 21026.1817979394. The cubic root of 442100321 is about 761.7987868961.

Adding to 442100321 its reverse (123001244), we get a palindrome (565101565).

The spelling of 442100321 in words is "four hundred forty-two million, one hundred thousand, three hundred twenty-one".