2105939 has 4 divisors (see below), whose sum is σ = 2297400. Its totient is φ = 1914480.

The previous prime is 2105933. The next prime is 2105947. The reversal of 2105939 is 9395012.

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

It is a cyclic number.

It is not a de Polignac number, because 2105939 - 2¹² = 2101843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95714 + ... + 95735.

It is an arithmetic number, because the mean of its divisors is an integer number (574350).

2^2105939 is an apocalyptic number.

2105939 is a deficient number, since it is larger than the sum of its proper divisors (191461).

2105939 is a wasteful number, since it uses less digits than its factorization.

2105939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191460.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 2105939 is about 1451.1853775449. The cubic root of 2105939 is about 128.1785228693.

The spelling of 2105939 in words is "two million, one hundred five thousand, nine hundred thirty-nine".