2018105 has 4 divisors (see below), whose sum is σ = 2421732. Its totient is φ = 1614480.

The previous prime is 2018077. The next prime is 2018111. The reversal of 2018105 is 5018102.

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 1290496 + 727609 = 1136^2 + 853^2 .

It is not a de Polignac number, because 2018105 - 2⁶ = 2018041 is a prime.

It is a Duffinian 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, 201806 + ... + 201815.

It is an arithmetic number, because the mean of its divisors is an integer number (605433).

2^2018105 is an apocalyptic number.

It is an amenable number.

2018105 is a deficient number, since it is larger than the sum of its proper divisors (403627).

2018105 is an equidigital number, since it uses as much as digits as its factorization.

2018105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403626.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 2018105 is about 1420.6002252569. The cubic root of 2018105 is about 126.3711447044.

The spelling of 2018105 in words is "two million, eighteen thousand, one hundred five".