256994 has 8 divisors (see below), whose sum is σ = 405840. Its totient is φ = 121716.

The previous prime is 256981. The next prime is 257003. The reversal of 256994 is 499652.

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

It is an unprimeable number.

256994 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3344 + ... + 3419.

It is an arithmetic number, because the mean of its divisors is an integer number (50730).

2²⁵⁶⁹⁹⁴ is an apocalyptic number.

256994 is a deficient number, since it is larger than the sum of its proper divisors (148846).

256994 is a wasteful number, since it uses less digits than its factorization.

256994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6784.

The product of its digits is 19440, while the sum is 35.

The square root of 256994 is about 506.9457564671. The cubic root of 256994 is about 63.5781170183.

The spelling of 256994 in words is "two hundred fifty-six thousand, nine hundred ninety-four".