4085009 has 4 divisors (see below), whose sum is σ = 4091316. Its totient is φ = 4078704.

The previous prime is 4084999. The next prime is 4085033. The reversal of 4085009 is 9005804.

4085009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2166784 + 1918225 = 1472^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 4085009 - 2²⁰ = 3036433 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 (4085069) 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, 2054 + ... + 3519.

It is an arithmetic number, because the mean of its divisors is an integer number (1022829).

Almost surely, 2^4085009 is an apocalyptic number.

It is an amenable number.

4085009 is a deficient number, since it is larger than the sum of its proper divisors (6307).

4085009 is an equidigital number, since it uses as much as digits as its factorization.

4085009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6306.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 4085009 is about 2021.1405196077. The cubic root of 4085009 is about 159.8567598232.

The spelling of 4085009 in words is "four million, eighty-five thousand, nine".