2004556 has 6 divisors (see below), whose sum is σ = 3507980. Its totient is φ = 1002276.

The previous prime is 2004539. The next prime is 2004559. The reversal of 2004556 is 6554002.

It is not an unprimeable number, because it can be changed into a prime (2004559) 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 as a sum of consecutive naturals, namely, 250566 + ... + 250573.

2^2004556 is an apocalyptic number.

It is an amenable number.

2004556 is a deficient number, since it is larger than the sum of its proper divisors (1503424).

2004556 is a wasteful number, since it uses less digits than its factorization.

2004556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501143 (or 501141 counting only the distinct ones).

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

The square root of 2004556 is about 1415.8234353195. The cubic root of 2004556 is about 126.0877024409.

Adding to 2004556 its reverse (6554002), we get a palindrome (8558558).

The spelling of 2004556 in words is "two million, four thousand, five hundred fifty-six".