242787 has 4 divisors (see below), whose sum is σ = 323720. Its totient is φ = 161856.

The previous prime is 242779. The next prime is 242789. The reversal of 242787 is 787242.

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

It is not a de Polignac number, because 242787 - 2³ = 242779 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 242787.

It is not an unprimeable number, because it can be changed into a prime (242789) 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, 40462 + ... + 40467.

It is an arithmetic number, because the mean of its divisors is an integer number (80930).

2²⁴²⁷⁸⁷ is an apocalyptic number.

242787 is a deficient number, since it is larger than the sum of its proper divisors (80933).

242787 is an equidigital number, since it uses as much as digits as its factorization.

242787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80932.

The product of its digits is 6272, while the sum is 30.

The square root of 242787 is about 492.7342082705. The cubic root of 242787 is about 62.3842765282.

The spelling of 242787 in words is "two hundred forty-two thousand, seven hundred eighty-seven".