256198 has 4 divisors (see below), whose sum is σ = 384300. Its totient is φ = 128098.

The previous prime is 256189. The next prime is 256199. The reversal of 256198 is 891652.

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

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64048 + ... + 64051.

It is an arithmetic number, because the mean of its divisors is an integer number (96075).

2²⁵⁶¹⁹⁸ is an apocalyptic number.

256198 is a deficient number, since it is larger than the sum of its proper divisors (128102).

256198 is a wasteful number, since it uses less digits than its factorization.

256198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128101.

The product of its digits is 4320, while the sum is 31.

The square root of 256198 is about 506.1600537379. The cubic root of 256198 is about 63.5124079335.

It can be divided in two parts, 256 and 198, that added together give a palindrome (454).

The spelling of 256198 in words is "two hundred fifty-six thousand, one hundred ninety-eight".