242287 has 4 divisors (see below), whose sum is σ = 245680. Its totient is φ = 238896.

The previous prime is 242279. The next prime is 242309. The reversal of 242287 is 782242.

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

It is a cyclic number.

It is not a de Polignac number, because 242287 - 2³ = 242279 is a prime.

It is a Duffinian number.

242287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1587 + ... + 1732.

It is an arithmetic number, because the mean of its divisors is an integer number (61420).

2²⁴²²⁸⁷ is an apocalyptic number.

242287 is a deficient number, since it is larger than the sum of its proper divisors (3393).

242287 is an equidigital number, since it uses as much as digits as its factorization.

242287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392.

The product of its digits is 1792, while the sum is 25.

The square root of 242287 is about 492.2265738458. The cubic root of 242287 is about 62.3414219885.

It can be divided in two parts, 242 and 287, that added together give a square (529 = 23²).

The spelling of 242287 in words is "two hundred forty-two thousand, two hundred eighty-seven".