256546 has 4 divisors (see below), whose sum is σ = 384822. Its totient is φ = 128272.

The previous prime is 256541. The next prime is 256561. The reversal of 256546 is 645652.

256546 is digitally balanced in base 2, 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., 255025 + 1521 = 505^2 + 39^2 .

It is not an unprimeable number, because it can be changed into a prime (256541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64135 + ... + 64138.

2²⁵⁶⁵⁴⁶ is an apocalyptic number.

256546 is a deficient number, since it is larger than the sum of its proper divisors (128276).

256546 is a wasteful number, since it uses less digits than its factorization.

256546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128275.

The product of its digits is 7200, while the sum is 28.

The square root of 256546 is about 506.5037018621. The cubic root of 256546 is about 63.5411517412.

The spelling of 256546 in words is "two hundred fifty-six thousand, five hundred forty-six".