242291 has 4 divisors (see below), whose sum is σ = 276912. Its totient is φ = 207672.

The previous prime is 242279. The next prime is 242309. The reversal of 242291 is 192242.

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 242291 - 2⁶ = 242227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242201) 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, 17300 + ... + 17313.

It is an arithmetic number, because the mean of its divisors is an integer number (69228).

2²⁴²²⁹¹ is an apocalyptic number.

242291 is a deficient number, since it is larger than the sum of its proper divisors (34621).

242291 is an equidigital number, since it uses as much as digits as its factorization.

242291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34620.

The product of its digits is 288, while the sum is 20.

The square root of 242291 is about 492.2306369986. The cubic root of 242291 is about 62.3417650587.

The spelling of 242291 in words is "two hundred forty-two thousand, two hundred ninety-one".