206045 has 18 divisors (see below), whose sum is σ = 297882. Its totient is φ = 136416.

The previous prime is 206039. The next prime is 206047. The reversal of 206045 is 540602.

It can be written as a sum of positive squares in 3 ways, for example, as 23716 + 182329 = 154^2 + 427^2 .

It is not a de Polignac number, because 206045 - 2⁶ = 205981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206047) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7091 + ... + 7119.

It is an arithmetic number, because the mean of its divisors is an integer number (16549).

2²⁰⁶⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

206045 is a deficient number, since it is larger than the sum of its proper divisors (91837).

206045 is an equidigital number, since it uses as much as digits as its factorization.

206045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 206045 is about 453.9217994325. The cubic root of 206045 is about 59.0637059653.

Adding to 206045 its reverse (540602), we get a palindrome (746647).

The spelling of 206045 in words is "two hundred six thousand, forty-five".