4220305 has 4 divisors (see below), whose sum is σ = 5064372. Its totient is φ = 3376240.

The previous prime is 4220297. The next prime is 4220323. The reversal of 4220305 is 5030224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1234321 + 2985984 = 1111^2 + 1728^2 .

It is not a de Polignac number, because 4220305 - 2³ = 4220297 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422026 + ... + 422035.

It is an arithmetic number, because the mean of its divisors is an integer number (1266093).

Almost surely, 2^4220305 is an apocalyptic number.

It is an amenable number.

4220305 is a deficient number, since it is larger than the sum of its proper divisors (844067).

4220305 is an equidigital number, since it uses as much as digits as its factorization.

4220305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844066.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 4220305 is about 2054.3380929146. The cubic root of 4220305 is about 161.6024520304.

Adding to 4220305 its reverse (5030224), we get a palindrome (9250529).

The spelling of 4220305 in words is "four million, two hundred twenty thousand, three hundred five".