445204021 has 8 divisors (see below), whose sum is σ = 448704000. Its totient is φ = 441711600.

The previous prime is 445204013. The next prime is 445204037. The reversal of 445204021 is 120402544.

It is a happy number.

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 445204021 - 2³ = 445204013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 445203983 and 445204001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445204121) 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, 184380 + ... + 186778.

It is an arithmetic number, because the mean of its divisors is an integer number (56088000).

Almost surely, 2^445204021 is an apocalyptic number.

It is an amenable number.

445204021 is a deficient number, since it is larger than the sum of its proper divisors (3499979).

445204021 is a wasteful number, since it uses less digits than its factorization.

445204021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 445204021 is about 21099.8583170599. The cubic root of 445204021 is about 763.5773299856.

Adding to 445204021 its reverse (120402544), we get a palindrome (565606565).

The spelling of 445204021 in words is "four hundred forty-five million, two hundred four thousand, twenty-one".