445020321 has 8 divisors (see below), whose sum is σ = 594643840. Its totient is φ = 296038512.

The previous prime is 445020293. The next prime is 445020343. The reversal of 445020321 is 123020544.

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

It is not a de Polignac number, because 445020321 - 2¹⁹ = 444496033 is a prime.

It is a super-2 number, since 2×445020321² = 396086172205886082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (445020371) 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, 158806 + ... + 161583.

It is an arithmetic number, because the mean of its divisors is an integer number (74330480).

Almost surely, 2^445020321 is an apocalyptic number.

It is an amenable number.

445020321 is a deficient number, since it is larger than the sum of its proper divisors (149623519).

445020321 is a wasteful number, since it uses less digits than its factorization.

445020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320855.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 445020321 is about 21095.5047581232. The cubic root of 445020321 is about 763.4722931591.

Adding to 445020321 its reverse (123020544), we get a palindrome (568040865).

The spelling of 445020321 in words is "four hundred forty-five million, twenty thousand, three hundred twenty-one".