256598 has 8 divisors (see below), whose sum is σ = 407592. Its totient is φ = 120736.

The previous prime is 256589. The next prime is 256603. The reversal of 256598 is 895652.

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

It is a congruent number.

It is an unprimeable number.

256598 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 3740 + ... + 3807.

It is an arithmetic number, because the mean of its divisors is an integer number (50949).

2²⁵⁶⁵⁹⁸ is an apocalyptic number.

256598 is a deficient number, since it is larger than the sum of its proper divisors (150994).

256598 is a wasteful number, since it uses less digits than its factorization.

256598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7566.

The product of its digits is 21600, while the sum is 35.

The square root of 256598 is about 506.5550315612. Note that the first 3 decimals coincide. The cubic root of 256598 is about 63.5454445602.

The spelling of 256598 in words is "two hundred fifty-six thousand, five hundred ninety-eight".