1004003 has 32 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 668160.

The previous prime is 1003963. The next prime is 1004027. The reversal of 1004003 is 3004001.

Added to its reverse (3004001) it gives a square (4008004 = 2002²).

It is a Cunningham number, because it is equal to 1002²-1.

It is a cyclic number.

It is not a de Polignac number, because 1004003 - 2⁸ = 1003747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1004033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16988 + ... + 17046.

It is an arithmetic number, because the mean of its divisors is an integer number (45360).

2^1004003 is an apocalyptic number.

1004003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1004003 is a deficient number, since it is larger than the sum of its proper divisors (447517).

1004003 is a wasteful number, since it uses less digits than its factorization.

1004003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 1004003 is about 1001.9995009979. Note that the first 3 decimals coincide. The cubic root of 1004003 is about 100.1332556837.

Adding to 1004003 its reverse (3004001), we get a palindrome (4008004).

The spelling of 1004003 in words is "one million, four thousand, three".