256329 has 12 divisors (see below), whose sum is σ = 390000. Its totient is φ = 161784.

The previous prime is 256313. The next prime is 256337. The reversal of 256329 is 923652.

256329 is a `hidden beast` number, since 25 + 632 + 9 = 666.

It is not a de Polignac number, because 256329 - 2⁴ = 256313 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 5⁷ + 3³ + 6⁵ + 2¹⁷ + 9⁴ .

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

256329 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (256349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 579 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (32500).

2²⁵⁶³²⁹ is an apocalyptic number.

It is an amenable number.

256329 is a deficient number, since it is larger than the sum of its proper divisors (133671).

256329 is a wasteful number, since it uses less digits than its factorization.

256329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524 (or 1521 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 256329 is about 506.2894429079. The cubic root of 256329 is about 63.5232312131.

It can be divided in two parts, 256 and 329, that added together give a palindrome (585).

The spelling of 256329 in words is "two hundred fifty-six thousand, three hundred twenty-nine".