256835 has 8 divisors (see below), whose sum is σ = 318336. Its totient is φ = 198720.

The previous prime is 256831. The next prime is 256873. The reversal of 256835 is 538652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256835 - 2² = 256831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256798 and 256807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256831) 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 7 ways as a sum of consecutive naturals, for example, 674 + ... + 983.

It is an arithmetic number, because the mean of its divisors is an integer number (39792).

2²⁵⁶⁸³⁵ is an apocalyptic number.

256835 is a deficient number, since it is larger than the sum of its proper divisors (61501).

256835 is a wasteful number, since it uses less digits than its factorization.

256835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693.

The product of its digits is 7200, while the sum is 29.

The square root of 256835 is about 506.7889106916. The cubic root of 256835 is about 63.5650025667.

The spelling of 256835 in words is "two hundred fifty-six thousand, eight hundred thirty-five".