256167 has 6 divisors (see below), whose sum is σ = 370032. Its totient is φ = 170772.

The previous prime is 256163. The next prime is 256169. The reversal of 256167 is 761652.

It is not a de Polignac number, because 256167 - 2² = 256163 is a prime.

It is an alternating number because its digits alternate between even and odd.

256167 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 256167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14223 + ... + 14240.

It is an arithmetic number, because the mean of its divisors is an integer number (61672).

2²⁵⁶¹⁶⁷ is an apocalyptic number.

256167 is a deficient number, since it is larger than the sum of its proper divisors (113865).

256167 is a wasteful number, since it uses less digits than its factorization.

256167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28469 (or 28466 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 256167 is about 506.1294300868. The cubic root of 256167 is about 63.5098461596.

It can be divided in two parts, 2561 and 67, that added together give a triangular number (2628 = T₇₂).

The spelling of 256167 in words is "two hundred fifty-six thousand, one hundred sixty-seven".