2004539 has 2 divisors, whose sum is σ = 2004540. Its totient is φ = 2004538.

The previous prime is 2004529. The next prime is 2004559. The reversal of 2004539 is 9354002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2004539 - 2²⁰ = 955963 is a prime.

It is not a weakly prime, because it can be changed into another prime (2004529) 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 as a sum of consecutive naturals, namely, 1002269 + 1002270.

It is an arithmetic number, because the mean of its divisors is an integer number (1002270).

2^2004539 is an apocalyptic number.

2004539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2004539 is an equidigital number, since it uses as much as digits as its factorization.

2004539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2004539 is about 1415.8174317333. The cubic root of 2004539 is about 126.0873460034.

The spelling of 2004539 in words is "two million, four thousand, five hundred thirty-nine".