287042 has 24 divisors (see below), whose sum is σ = 523260. Its totient is φ = 117600.

The previous prime is 287003. The next prime is 287047. The reversal of 287042 is 240782.

It can be written as a sum of positive squares in 2 ways, for example, as 261121 + 25921 = 511^2 + 161^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 286999 and 287017.

It is not an unprimeable number, because it can be changed into a prime (287047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2792 + ... + 2892.

2²⁸⁷⁰⁴² is an apocalyptic number.

287042 is a deficient number, since it is larger than the sum of its proper divisors (236218).

287042 is a wasteful number, since it uses less digits than its factorization.

287042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 287042 is about 535.7630073083. The cubic root of 287042 is about 65.9652403437.

Subtracting from 287042 its product of nonzero digits (896), we obtain a triangular number (286146 = T₇₅₆).

The spelling of 287042 in words is "two hundred eighty-seven thousand, forty-two".