287133 has 24 divisors (see below), whose sum is σ = 485184. Its totient is φ = 147840.

The previous prime is 287117. The next prime is 287137. The reversal of 287133 is 331782.

It is not a de Polignac number, because 287133 - 2⁴ = 287117 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2485 + ... + 2597.

It is an arithmetic number, because the mean of its divisors is an integer number (20216).

2²⁸⁷¹³³ is an apocalyptic number.

It is an amenable number.

287133 is a deficient number, since it is larger than the sum of its proper divisors (198051).

287133 is a wasteful number, since it uses less digits than its factorization.

287133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 134 counting only the distinct ones).

The product of its digits is 1008, while the sum is 24.

The square root of 287133 is about 535.8479261880. The cubic root of 287133 is about 65.9722105230.

The spelling of 287133 in words is "two hundred eighty-seven thousand, one hundred thirty-three".