256346 has 4 divisors (see below), whose sum is σ = 384522. Its totient is φ = 128172.

The previous prime is 256337. The next prime is 256349. The reversal of 256346 is 643652.

256346 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 130321 + 126025 = 361^2 + 355^2 .

It is a d-powerful number, because it can be written as 2³ + 5⁷ + 3¹¹ + 6 + 4⁵ + 6² .

It is a zygodrome in base 4.

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

256346 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 as a sum of consecutive naturals, namely, 64085 + ... + 64088.

2²⁵⁶³⁴⁶ is an apocalyptic number.

256346 is a deficient number, since it is larger than the sum of its proper divisors (128176).

256346 is a wasteful number, since it uses less digits than its factorization.

256346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128175.

The product of its digits is 4320, while the sum is 26.

The square root of 256346 is about 506.3062314450. The cubic root of 256346 is about 63.5246354905.

Adding to 256346 its reverse (643652), we get a palindrome (899998).

The spelling of 256346 in words is "two hundred fifty-six thousand, three hundred forty-six".