256874 has 4 divisors (see below), whose sum is σ = 385314. Its totient is φ = 128436.

The previous prime is 256873. The next prime is 256877. The reversal of 256874 is 478652.

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., 255025 + 1849 = 505^2 + 43^2 .

It is a Curzon number.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 256874.

It is not an unprimeable number, because it can be changed into a prime (256873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64217 + ... + 64220.

2²⁵⁶⁸⁷⁴ is an apocalyptic number.

256874 is a deficient number, since it is larger than the sum of its proper divisors (128440).

256874 is a wasteful number, since it uses less digits than its factorization.

256874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128439.

The product of its digits is 13440, while the sum is 32.

The square root of 256874 is about 506.8273867896. The cubic root of 256874 is about 63.5682198199.

The spelling of 256874 in words is "two hundred fifty-six thousand, eight hundred seventy-four".