2102105 has 4 divisors (see below), whose sum is σ = 2522532. Its totient is φ = 1681680.

The previous prime is 2102099. The next prime is 2102117. The reversal of 2102105 is 5012012.

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 1364224 + 737881 = 1168^2 + 859^2 .

It is not a de Polignac number, because 2102105 - 2⁸ = 2101849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210206 + ... + 210215.

It is an arithmetic number, because the mean of its divisors is an integer number (630633).

2^2102105 is an apocalyptic number.

It is an amenable number.

2102105 is a deficient number, since it is larger than the sum of its proper divisors (420427).

2102105 is an equidigital number, since it uses as much as digits as its factorization.

2102105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420426.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 2102105 is about 1449.8637867055. The cubic root of 2102105 is about 128.1006898156.

Adding to 2102105 its reverse (5012012), we get a palindrome (7114117).

The spelling of 2102105 in words is "two million, one hundred two thousand, one hundred five".