255946 has 4 divisors (see below), whose sum is σ = 383922. Its totient is φ = 127972.

The previous prime is 255923. The next prime is 255947. The reversal of 255946 is 649552.

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

It can be written as a sum of positive squares in only one way, i.e., 168921 + 87025 = 411^2 + 295^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63985 + ... + 63988.

2²⁵⁵⁹⁴⁶ is an apocalyptic number.

255946 is a deficient number, since it is larger than the sum of its proper divisors (127976).

255946 is a wasteful number, since it uses less digits than its factorization.

255946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127975.

The product of its digits is 10800, while the sum is 31.

The square root of 255946 is about 505.9110593770. The cubic root of 255946 is about 63.4915771993.

It can be divided in two parts, 25594 and 6, that added together give a square (25600 = 160²).

The spelling of 255946 in words is "two hundred fifty-five thousand, nine hundred forty-six".