2005001 has 2 divisors, whose sum is σ = 2005002. Its totient is φ = 2005000.

The previous prime is 2004991. The next prime is 2005019. The reversal of 2005001 is 1005002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1974025 + 30976 = 1405^2 + 176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2005001.

It is not a weakly prime, because it can be changed into another prime (2005021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002500 + 1002501.

It is an arithmetic number, because the mean of its divisors is an integer number (1002501).

2^2005001 is an apocalyptic number.

It is an amenable number.

2005001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005001 is an equidigital number, since it uses as much as digits as its factorization.

2005001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 2005001 is about 1415.9805789629. The cubic root of 2005001 is about 126.0970320009.

Subtracting from 2005001 its reverse (1005002), we obtain a palindrome (999999).

The spelling of 2005001 in words is "two million, five thousand, one".