4065205 has 4 divisors (see below), whose sum is σ = 4878252. Its totient is φ = 3252160.

The previous prime is 4065203. The next prime is 4065209. The reversal of 4065205 is 5025604.

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 2099601 + 1965604 = 1449^2 + 1402^2 .

It is not a de Polignac number, because 4065205 - 2¹ = 4065203 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4065203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406516 + ... + 406525.

It is an arithmetic number, because the mean of its divisors is an integer number (1219563).

Almost surely, 2^4065205 is an apocalyptic number.

It is an amenable number.

4065205 is a deficient number, since it is larger than the sum of its proper divisors (813047).

4065205 is an equidigital number, since it uses as much as digits as its factorization.

4065205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813046.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 4065205 is about 2016.2353533256. The cubic root of 4065205 is about 159.5980143303.

The spelling of 4065205 in words is "four million, sixty-five thousand, two hundred five".