255943 has 4 divisors (see below), whose sum is σ = 257368. Its totient is φ = 254520.

The previous prime is 255923. The next prime is 255947. The reversal of 255943 is 349552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255943 is a prime.

It is a Duffinian number.

255943 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396 + ... + 817.

It is an arithmetic number, because the mean of its divisors is an integer number (64342).

2²⁵⁵⁹⁴³ is an apocalyptic number.

255943 is a deficient number, since it is larger than the sum of its proper divisors (1425).

255943 is a wasteful number, since it uses less digits than its factorization.

255943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424.

The product of its digits is 5400, while the sum is 28.

The square root of 255943 is about 505.9080944203. The cubic root of 255943 is about 63.4913291320.

It can be divided in two parts, 2 and 55943, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 255943 in words is "two hundred fifty-five thousand, nine hundred forty-three".