242091 has 12 divisors (see below), whose sum is σ = 359632. Its totient is φ = 156816.

The previous prime is 242083. The next prime is 242093. The reversal of 242091 is 190242.

It is not a de Polignac number, because 242091 - 2³ = 242083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242093) 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 11 ways as a sum of consecutive naturals, for example, 31 + ... + 696.

2²⁴²⁰⁹¹ is an apocalyptic number.

242091 is a deficient number, since it is larger than the sum of its proper divisors (117541).

242091 is a wasteful number, since it uses less digits than its factorization.

242091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 242091 is about 492.0274382593. The cubic root of 242091 is about 62.3246069234.

The spelling of 242091 in words is "two hundred forty-two thousand, ninety-one".