287642 has 4 divisors (see below), whose sum is σ = 431466. Its totient is φ = 143820.

The previous prime is 287629. The next prime is 287669. The reversal of 287642 is 246782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 259081 + 28561 = 509^2 + 169^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71909 + ... + 71912.

2²⁸⁷⁶⁴² is an apocalyptic number.

287642 is a deficient number, since it is larger than the sum of its proper divisors (143824).

287642 is a wasteful number, since it uses less digits than its factorization.

287642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143823.

The product of its digits is 5376, while the sum is 29.

The square root of 287642 is about 536.3226640745. The cubic root of 287642 is about 66.0111704387.

It can be divided in two parts, 287 and 642, that added together give a palindrome (929).

The spelling of 287642 in words is "two hundred eighty-seven thousand, six hundred forty-two".