2004557 has 4 divisors (see below), whose sum is σ = 2110080. Its totient is φ = 1899036.

The previous prime is 2004539. The next prime is 2004559. The reversal of 2004557 is 7554002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2004557 - 2¹⁸ = 1742413 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 (2004559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52733 + ... + 52770.

It is an arithmetic number, because the mean of its divisors is an integer number (527520).

2^2004557 is an apocalyptic number.

It is an amenable number.

2004557 is a deficient number, since it is larger than the sum of its proper divisors (105523).

2004557 is a wasteful number, since it uses less digits than its factorization.

2004557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105522.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 2004557 is about 1415.8237884709. The cubic root of 2004557 is about 126.0877234078.

Adding to 2004557 its reverse (7554002), we get a palindrome (9558559).

It can be divided in two parts, 20045 and 57, that added together give a palindrome (20102).

The spelling of 2004557 in words is "two million, four thousand, five hundred fifty-seven".