287045 has 16 divisors (see below), whose sum is σ = 399168. Its totient is φ = 195840.

The previous prime is 287003. The next prime is 287047. The reversal of 287045 is 540782.

It is not a de Polignac number, because 287045 - 2⁶ = 286981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287047) 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 15 ways as a sum of consecutive naturals, for example, 782 + ... + 1088.

It is an arithmetic number, because the mean of its divisors is an integer number (24948).

2²⁸⁷⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

287045 is a deficient number, since it is larger than the sum of its proper divisors (112123).

287045 is a wasteful number, since it uses less digits than its factorization.

287045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 287045 is about 535.7658070463. The cubic root of 287045 is about 65.9654701533.

The spelling of 287045 in words is "two hundred eighty-seven thousand, forty-five".