287485 has 8 divisors (see below), whose sum is σ = 376416. Its totient is φ = 209040.

The previous prime is 287449. The next prime is 287491. The reversal of 287485 is 584782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 287485 - 2⁹ = 286973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 287485.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2559 + ... + 2668.

It is an arithmetic number, because the mean of its divisors is an integer number (47052).

2²⁸⁷⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

287485 is a deficient number, since it is larger than the sum of its proper divisors (88931).

287485 is a wasteful number, since it uses less digits than its factorization.

287485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5243.

The product of its digits is 17920, while the sum is 34.

The square root of 287485 is about 536.1762769836. The cubic root of 287485 is about 65.9991582384. Note that the first 3 decimals are identical.

The spelling of 287485 in words is "two hundred eighty-seven thousand, four hundred eighty-five".