4223665 has 4 divisors (see below), whose sum is σ = 5068404. Its totient is φ = 3378928.

The previous prime is 4223663. The next prime is 4223669. The reversal of 4223665 is 5663224.

It is a happy number.

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 3139984 + 1083681 = 1772^2 + 1041^2 .

It is a cyclic number.

It is not a de Polignac number, because 4223665 - 2¹ = 4223663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4223663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422362 + ... + 422371.

It is an arithmetic number, because the mean of its divisors is an integer number (1267101).

Almost surely, 2^4223665 is an apocalyptic number.

It is an amenable number.

4223665 is a deficient number, since it is larger than the sum of its proper divisors (844739).

4223665 is an equidigital number, since it uses as much as digits as its factorization.

4223665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844738.

The product of its digits is 8640, while the sum is 28.

The square root of 4223665 is about 2055.1557118622. The cubic root of 4223665 is about 161.6453273047.

Adding to 4223665 its reverse (5663224), we get a palindrome (9886889).

The spelling of 4223665 in words is "four million, two hundred twenty-three thousand, six hundred sixty-five".