256941 has 6 divisors (see below), whose sum is σ = 371150. Its totient is φ = 171288.

The previous prime is 256939. The next prime is 256957. The reversal of 256941 is 149652.

It can be written as a sum of positive squares in only one way, i.e., 184041 + 72900 = 429^2 + 270^2 .

It is not a de Polignac number, because 256941 - 2¹ = 256939 is a prime.

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

It is a Duffinian number.

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 256941.

It is not an unprimeable number, because it can be changed into a prime (256901) 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 5 ways as a sum of consecutive naturals, for example, 14266 + ... + 14283.

2²⁵⁶⁹⁴¹ is an apocalyptic number.

It is an amenable number.

256941 is a deficient number, since it is larger than the sum of its proper divisors (114209).

256941 is a wasteful number, since it uses less digits than its factorization.

256941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28555 (or 28552 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 256941 is about 506.8934799344. The cubic root of 256941 is about 63.5737461356.

The spelling of 256941 in words is "two hundred fifty-six thousand, nine hundred forty-one".