242791 has 4 divisors (see below), whose sum is σ = 245392. Its totient is φ = 240192.

The previous prime is 242789. The next prime is 242797. The reversal of 242791 is 197242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 197242 = 2 ⋅98621.

It is a cyclic number.

It is not a de Polignac number, because 242791 - 2¹ = 242789 is a prime.

It is a super-3 number, since 3×242791³ = 42935745333959013, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155 + ... + 1348.

It is an arithmetic number, because the mean of its divisors is an integer number (61348).

2²⁴²⁷⁹¹ is an apocalyptic number.

242791 is a deficient number, since it is larger than the sum of its proper divisors (2601).

242791 is an equidigital number, since it uses as much as digits as its factorization.

242791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600.

The product of its digits is 1008, while the sum is 25.

The square root of 242791 is about 492.7382672373. The cubic root of 242791 is about 62.3846191271.

The spelling of 242791 in words is "two hundred forty-two thousand, seven hundred ninety-one".