2004003 has 12 divisors (see below), whose sum is σ = 2923128.
Its totient is φ = 1322880.
The previous prime is 2004001. The next prime is 2004007. The reversal of 2004003 is 3004002.
Adding to 2004003 its reverse (3004002), we get a palindrome (5008005).
Subtracting 2004003 from its reverse (3004002), we obtain a palindrome (999999).
It is not a de Polignac number, because 2004003 - 21 = 2004001 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is an Ulam number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2004001) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78 + ... + 2003.
It is an arithmetic number, because the mean of its divisors is an integer number (243594).
22004003 is an apocalyptic number.
2004003 is a deficient number, since it is larger than the sum of its proper divisors (919125).
2004003 is a wasteful number, since it uses less digits than its factorization.
2004003 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2194 (or 2191 counting only the distinct ones).
The product of its (nonzero) digits is 24, while the sum is 9.
The square root of 2004003 is about 1415.6281291356.
The cubic root of 2004003 is about 126.0761067040.
The spelling of 2004003 in words is "two million, four thousand, three".