2003081 has 2 divisors, whose sum is σ = 2003082. Its totient is φ = 2003080.

The previous prime is 2003051. The next prime is 2003083. The reversal of 2003081 is 1803002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1666681 + 336400 = 1291^2 + 580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2003081 is a prime.

It is a super-2 number, since 2×2003081² = 8024666985122, which contains 22 as substring.

Together with 2003083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2003083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001540 + 1001541.

It is an arithmetic number, because the mean of its divisors is an integer number (1001541).

2^2003081 is an apocalyptic number.

It is an amenable number.

2003081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003081 is an equidigital number, since it uses as much as digits as its factorization.

2003081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2003081 is about 1415.3024411764. The cubic root of 2003081 is about 126.0567687419.

Adding to 2003081 its reverse (1803002), we get a palindrome (3806083).

The spelling of 2003081 in words is "two million, three thousand, eighty-one".