1000002005 has 8 divisors (see below), whose sum is σ = 1203565272. Its totient is φ = 797626368.

The previous prime is 1000001969. The next prime is 1000002043. The reversal of 1000002005 is 5002000001.

It can be written as a sum of positive squares in 4 ways, for example, as 230827249 + 769174756 = 15193^2 + 27734^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000002005 - 2²⁴ = 983224789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000001983 and 1000002001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295052 + ... + 298421.

It is an arithmetic number, because the mean of its divisors is an integer number (150445659).

Almost surely, 2^1000002005 is an apocalyptic number.

It is an amenable number.

1000002005 is a deficient number, since it is larger than the sum of its proper divisors (203563267).

1000002005 is an equidigital number, since it uses as much as digits as its factorization.

1000002005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593815.

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

The square root of 1000002005 is about 31622.8083035014. The cubic root of 1000002005 is about 1000.0006683329. Note that the first 3 decimals are identical.

Adding to 1000002005 its reverse (5002000001), we get a palindrome (6002002006).

The spelling of 1000002005 in words is "one billion, two thousand, five".