287143 has 4 divisors (see below), whose sum is σ = 290088. Its totient is φ = 284200.

The previous prime is 287141. The next prime is 287149. The reversal of 287143 is 341782.

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 287143 - 2¹ = 287141 is a prime.

It is a super-2 number, since 2×287143² = 164902204898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321 + ... + 1522.

It is an arithmetic number, because the mean of its divisors is an integer number (72522).

2²⁸⁷¹⁴³ is an apocalyptic number.

287143 is a deficient number, since it is larger than the sum of its proper divisors (2945).

287143 is a wasteful number, since it uses less digits than its factorization.

287143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944.

The product of its digits is 1344, while the sum is 25.

The square root of 287143 is about 535.8572571124. The cubic root of 287143 is about 65.9729763870.

It can be divided in two parts, 287 and 143, that multiplied together give a triangular number (41041 = T₂₈₆).

The spelling of 287143 in words is "two hundred eighty-seven thousand, one hundred forty-three".