4220605 has 4 divisors (see below), whose sum is σ = 5064732. Its totient is φ = 3376480.

The previous prime is 4220599. The next prime is 4220609. The reversal of 4220605 is 5060224.

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 480249 + 3740356 = 693^2 + 1934^2 .

It is not a de Polignac number, because 4220605 - 2³ = 4220597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422056 + ... + 422065.

It is an arithmetic number, because the mean of its divisors is an integer number (1266183).

Almost surely, 2^4220605 is an apocalyptic number.

It is an amenable number.

4220605 is a deficient number, since it is larger than the sum of its proper divisors (844127).

4220605 is an equidigital number, since it uses as much as digits as its factorization.

4220605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844126.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 4220605 is about 2054.4111078360. The cubic root of 4220605 is about 161.6062811049.

Adding to 4220605 its reverse (5060224), we get a palindrome (9280829).

The spelling of 4220605 in words is "four million, two hundred twenty thousand, six hundred five".