255965 has 4 divisors (see below), whose sum is σ = 307164. Its totient is φ = 204768.

The previous prime is 255961. The next prime is 255971. The reversal of 255965 is 569552.

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 38809 + 217156 = 197^2 + 466^2 .

It is a cyclic number.

It is not a de Polignac number, because 255965 - 2² = 255961 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 (255961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25592 + ... + 25601.

It is an arithmetic number, because the mean of its divisors is an integer number (76791).

2²⁵⁵⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

255965 is a deficient number, since it is larger than the sum of its proper divisors (51199).

255965 is an equidigital number, since it uses as much as digits as its factorization.

255965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51198.

The product of its digits is 13500, while the sum is 32.

The square root of 255965 is about 505.9298370328. The cubic root of 255965 is about 63.4931482470.

The spelling of 255965 in words is "two hundred fifty-five thousand, nine hundred sixty-five".