206105 has 4 divisors (see below), whose sum is σ = 247332. Its totient is φ = 164880.

The previous prime is 206083. The next prime is 206123. The reversal of 206105 is 501602.

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 52441 + 153664 = 229^2 + 392^2 .

It is not a de Polignac number, because 206105 - 2¹⁰ = 205081 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 206105.

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, 20606 + ... + 20615.

It is an arithmetic number, because the mean of its divisors is an integer number (61833).

2²⁰⁶¹⁰⁵ is an apocalyptic number.

It is an amenable number.

206105 is a deficient number, since it is larger than the sum of its proper divisors (41227).

206105 is an equidigital number, since it uses as much as digits as its factorization.

206105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41226.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 206105 is about 453.9878853009. The cubic root of 206105 is about 59.0694384969.

Adding to 206105 its reverse (501602), we get a palindrome (707707).

The spelling of 206105 in words is "two hundred six thousand, one hundred five".