2081005 has 4 divisors (see below), whose sum is σ = 2497212. Its totient is φ = 1664800.

The previous prime is 2080979. The next prime is 2081029. The reversal of 2081005 is 5001802.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 972196 + 1108809 = 986^2 + 1053^2 .

It is not a de Polignac number, because 2081005 - 2⁷ = 2080877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2081005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208096 + ... + 208105.

It is an arithmetic number, because the mean of its divisors is an integer number (624303).

2^2081005 is an apocalyptic number.

It is an amenable number.

2081005 is a deficient number, since it is larger than the sum of its proper divisors (416207).

2081005 is an equidigital number, since it uses as much as digits as its factorization.

2081005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416206.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2081005 is about 1442.5688891696. The cubic root of 2081005 is about 127.6706416952.

Adding to 2081005 its reverse (5001802), we get a palindrome (7082807).

The spelling of 2081005 in words is "two million, eighty-one thousand, five".