268281 has 12 divisors (see below), whose sum is σ = 417508. Its totient is φ = 165024.

The previous prime is 268271. The next prime is 268283. The reversal of 268281 is 182862.

It can be written as a sum of positive squares in 2 ways, for example, as 57600 + 210681 = 240^2 + 459^2 .

It is not a de Polignac number, because 268281 - 2⁷ = 268153 is a prime.

It is a super-2 number, since 2×268281² = 143949389922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268283) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 1030 + ... + 1263.

2²⁶⁸²⁸¹ is an apocalyptic number.

It is an amenable number.

268281 is a deficient number, since it is larger than the sum of its proper divisors (149227).

268281 is a wasteful number, since it uses less digits than its factorization.

268281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312 (or 2309 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 268281 is about 517.9584925455. The cubic root of 268281 is about 64.4955828956.

The spelling of 268281 in words is "two hundred sixty-eight thousand, two hundred eighty-one".