287243 has 4 divisors (see below), whose sum is σ = 313368. Its totient is φ = 261120.

The previous prime is 287239. The next prime is 287251. The reversal of 287243 is 342782.

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

It is a cyclic number.

It is not a de Polignac number, because 287243 - 2² = 287239 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287243.

It is not an unprimeable number, because it can be changed into a prime (287233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13046 + ... + 13067.

It is an arithmetic number, because the mean of its divisors is an integer number (78342).

2²⁸⁷²⁴³ is an apocalyptic number.

287243 is a deficient number, since it is larger than the sum of its proper divisors (26125).

287243 is a wasteful number, since it uses less digits than its factorization.

287243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26124.

The product of its digits is 2688, while the sum is 26.

The square root of 287243 is about 535.9505574211. The cubic root of 287243 is about 65.9806340488.

The spelling of 287243 in words is "two hundred eighty-seven thousand, two hundred forty-three".