268543 has 4 divisors (see below), whose sum is σ = 292968. Its totient is φ = 244120.

The previous prime is 268537. The next prime is 268547. The reversal of 268543 is 345862.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268543 is a prime.

It is a Duffinian number.

268543 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268547) 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 3 ways as a sum of consecutive naturals, for example, 12196 + ... + 12217.

It is an arithmetic number, because the mean of its divisors is an integer number (73242).

2²⁶⁸⁵⁴³ is an apocalyptic number.

268543 is a deficient number, since it is larger than the sum of its proper divisors (24425).

268543 is a wasteful number, since it uses less digits than its factorization.

268543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24424.

The product of its digits is 5760, while the sum is 28.

The square root of 268543 is about 518.2113468461. The cubic root of 268543 is about 64.5165712685.

The spelling of 268543 in words is "two hundred sixty-eight thousand, five hundred forty-three".