64205 has 4 divisors (see below), whose sum is σ = 77052. Its totient is φ = 51360.

The previous prime is 64189. The next prime is 64217. The reversal of 64205 is 50246.

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 26569 + 37636 = 163^2 + 194^2 .

It is not a de Polignac number, because 64205 - 2⁴ = 64189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6416 + ... + 6425.

It is an arithmetic number, because the mean of its divisors is an integer number (19263).

2⁶⁴²⁰⁵ is an apocalyptic number.

It is an amenable number.

64205 is a deficient number, since it is larger than the sum of its proper divisors (12847).

64205 is a wasteful number, since it uses less digits than its factorization.

64205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12846.

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

The square root of 64205 is about 253.3870557073. The cubic root of 64205 is about 40.0426628143.

The spelling of 64205 in words is "sixty-four thousand, two hundred five".