256159 has 4 divisors (see below), whose sum is σ = 258304. Its totient is φ = 254016.

The previous prime is 256147. The next prime is 256163. The reversal of 256159 is 951652.

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

It is a 6-Lehmer number, since φ(256159) divides (256159-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 256159 - 2⁷ = 256031 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 (256129) 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, 882 + ... + 1135.

It is an arithmetic number, because the mean of its divisors is an integer number (64576).

2²⁵⁶¹⁵⁹ is an apocalyptic number.

256159 is a deficient number, since it is larger than the sum of its proper divisors (2145).

256159 is a wasteful number, since it uses less digits than its factorization.

256159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144.

The product of its digits is 2700, while the sum is 28.

The square root of 256159 is about 506.1215269083. The cubic root of 256159 is about 63.5091850231.

It can be divided in two parts, 256 and 159, that multiplied together give a palindrome (40704).

The spelling of 256159 in words is "two hundred fifty-six thousand, one hundred fifty-nine".