6420223 has 8 divisors (see below), whose sum is σ = 6674400. Its totient is φ = 6168288.

The previous prime is 6420221. The next prime is 6420259. The reversal of 6420223 is 3220246.

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 6420223 - 2¹ = 6420221 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 6420223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7390 + ... + 8212.

It is an arithmetic number, because the mean of its divisors is an integer number (834300).

Almost surely, 2^6420223 is an apocalyptic number.

6420223 is a deficient number, since it is larger than the sum of its proper divisors (254177).

6420223 is a wasteful number, since it uses less digits than its factorization.

6420223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 6420223 is about 2533.8158970217. The cubic root of 6420223 is about 185.8589036695.

Adding to 6420223 its reverse (3220246), we get a palindrome (9640469).

The spelling of 6420223 in words is "six million, four hundred twenty thousand, two hundred twenty-three".