205256 has 8 divisors (see below), whose sum is σ = 384870. Its totient is φ = 102624.

The previous prime is 205253. The next prime is 205267. The reversal of 205256 is 652502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 188356 + 16900 = 434^2 + 130^2 .

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

It is not an unprimeable number, because it can be changed into a prime (205253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12821 + ... + 12836.

2²⁰⁵²⁵⁶ is an apocalyptic number.

It is an amenable number.

205256 is a deficient number, since it is larger than the sum of its proper divisors (179614).

205256 is a wasteful number, since it uses less digits than its factorization.

205256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25663 (or 25659 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 205256 is about 453.0518734097. The cubic root of 205256 is about 58.9882194233.

Adding to 205256 its reverse (652502), we get a palindrome (857758).

The spelling of 205256 in words is "two hundred five thousand, two hundred fifty-six".