420203321 has 8 divisors (see below), whose sum is σ = 426411720. Its totient is φ = 414033408.

The previous prime is 420203317. The next prime is 420203327. The reversal of 420203321 is 123302024.

It can be written as a sum of positive squares in 4 ways, for example, as 213160000 + 207043321 = 14600^2 + 14389^2 .

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 420203321 - 2² = 420203317 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 420203321.

It is not an unprimeable number, because it can be changed into a prime (420203327) 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, 12755 + ... + 31671.

It is an arithmetic number, because the mean of its divisors is an integer number (53301465).

Almost surely, 2^420203321 is an apocalyptic number.

It is an amenable number.

420203321 is a deficient number, since it is larger than the sum of its proper divisors (6208399).

420203321 is a wasteful number, since it uses less digits than its factorization.

420203321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19243.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 420203321 is about 20498.8614561882. The cubic root of 420203321 is about 749.0080640699.

Adding to 420203321 its reverse (123302024), we get a palindrome (543505345).

The spelling of 420203321 in words is "four hundred twenty million, two hundred three thousand, three hundred twenty-one".