256529 has 8 divisors (see below), whose sum is σ = 315840. Its totient is φ = 202896.

The previous prime is 256517. The next prime is 256541. The reversal of 256529 is 925652.

256529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256517) and next prime (256541).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256529 is a prime.

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

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256529.

It is not an unprimeable number, because it can be changed into a prime (256579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1319 + ... + 1500.

It is an arithmetic number, because the mean of its divisors is an integer number (39480).

2²⁵⁶⁵²⁹ is an apocalyptic number.

It is an amenable number.

256529 is a deficient number, since it is larger than the sum of its proper divisors (59311).

256529 is a wasteful number, since it uses less digits than its factorization.

256529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839.

The product of its digits is 5400, while the sum is 29.

The square root of 256529 is about 506.4869198706. The cubic root of 256529 is about 63.5397481937.

It can be divided in two parts, 256 and 529, that multiplied together give a square (135424 = 368²).

The spelling of 256529 in words is "two hundred fifty-six thousand, five hundred twenty-nine".