4009165 has 4 divisors (see below), whose sum is σ = 4811004. Its totient is φ = 3207328.

The previous prime is 4009151. The next prime is 4009193. The reversal of 4009165 is 5619004.

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 1196836 + 2812329 = 1094^2 + 1677^2 .

It is a cyclic number.

It is not a de Polignac number, because 4009165 - 2⁷ = 4009037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 400912 + ... + 400921.

It is an arithmetic number, because the mean of its divisors is an integer number (1202751).

Almost surely, 2^4009165 is an apocalyptic number.

It is an amenable number.

4009165 is a deficient number, since it is larger than the sum of its proper divisors (801839).

4009165 is an equidigital number, since it uses as much as digits as its factorization.

4009165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801838.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 4009165 is about 2002.2899390448. The cubic root of 4009165 is about 158.8612504745.

The spelling of 4009165 in words is "four million, nine thousand, one hundred sixty-five".