256727 has 4 divisors (see below), whose sum is σ = 258600. Its totient is φ = 254856.

The previous prime is 256723. The next prime is 256757. The reversal of 256727 is 727652.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 256727 - 2² = 256723 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256727.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256727.

It is not an unprimeable number, because it can be changed into a prime (256721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713 + ... + 1010.

It is an arithmetic number, because the mean of its divisors is an integer number (64650).

2²⁵⁶⁷²⁷ is an apocalyptic number.

256727 is a deficient number, since it is larger than the sum of its proper divisors (1873).

256727 is a wasteful number, since it uses less digits than its factorization.

256727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872.

The product of its digits is 5880, while the sum is 29.

The square root of 256727 is about 506.6823462486. The cubic root of 256727 is about 63.5560915503.

The spelling of 256727 in words is "two hundred fifty-six thousand, seven hundred twenty-seven".