205064 has 8 divisors (see below), whose sum is σ = 384510. Its totient is φ = 102528.

The previous prime is 205063. The next prime is 205069. The reversal of 205064 is 460502.

It can be written as a sum of positive squares in only one way, i.e., 184900 + 20164 = 430^2 + 142^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 205064.

It is not an unprimeable number, because it can be changed into a prime (205063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12809 + ... + 12824.

2²⁰⁵⁰⁶⁴ is an apocalyptic number.

It is an amenable number.

205064 is a deficient number, since it is larger than the sum of its proper divisors (179446).

205064 is a wasteful number, since it uses less digits than its factorization.

205064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25639 (or 25635 counting only the distinct ones).

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

The square root of 205064 is about 452.8399275682. The cubic root of 205064 is about 58.9698208196.

Adding to 205064 its reverse (460502), we get a palindrome (665566).

The spelling of 205064 in words is "two hundred five thousand, sixty-four".