2102005 has 8 divisors (see below), whose sum is σ = 2534400. Its totient is φ = 1673616.

The previous prime is 2101961. The next prime is 2102021. The reversal of 2102005 is 5002012.

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 2102005 - 2¹³ = 2093813 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2101982 and 2102000.

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, 316 + ... + 2074.

It is an arithmetic number, because the mean of its divisors is an integer number (316800).

2^2102005 is an apocalyptic number.

It is an amenable number.

2102005 is a deficient number, since it is larger than the sum of its proper divisors (432395).

2102005 is a wasteful number, since it uses less digits than its factorization.

2102005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 2102005 is about 1449.8293002971. The cubic root of 2102005 is about 128.0986584753.

Adding to 2102005 its reverse (5002012), we get a palindrome (7104017).

The spelling of 2102005 in words is "two million, one hundred two thousand, five".