2003005 has 4 divisors (see below), whose sum is σ = 2403612. Its totient is φ = 1602400.

The previous prime is 2002997. The next prime is 2003009. The reversal of 2003005 is 5003002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5003002 = 2 ⋅2501501.

It can be written as a sum of positive squares in 2 ways, for example, as 480249 + 1522756 = 693^2 + 1234^2 .

It is not a de Polignac number, because 2003005 - 2³ = 2002997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002982 and 2003000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003009) 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 in 3 ways as a sum of consecutive naturals, for example, 200296 + ... + 200305.

It is an arithmetic number, because the mean of its divisors is an integer number (600903).

2^2003005 is an apocalyptic number.

It is an amenable number.

2003005 is a deficient number, since it is larger than the sum of its proper divisors (400607).

2003005 is an equidigital number, since it uses as much as digits as its factorization.

2003005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400606.

The product of its (nonzero) digits is 30, while the sum is 10.

The square root of 2003005 is about 1415.2755915369. The cubic root of 2003005 is about 126.0551744586.

Adding to 2003005 its reverse (5003002), we get a palindrome (7006007).

The spelling of 2003005 in words is "two million, three thousand, five".