242040091 has 4 divisors (see below), whose sum is σ = 242081784. Its totient is φ = 241998400.

The previous prime is 242040089. The next prime is 242040103. The reversal of 242040091 is 190040242.

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 242040091 - 2¹ = 242040089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242040191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10390 + ... + 24331.

It is an arithmetic number, because the mean of its divisors is an integer number (60520446).

Almost surely, 2^242040091 is an apocalyptic number.

242040091 is a deficient number, since it is larger than the sum of its proper divisors (41693).

242040091 is an equidigital number, since it uses as much as digits as its factorization.

242040091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41692.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 242040091 is about 15557.6377062843. The cubic root of 242040091 is about 623.2023789708.

The spelling of 242040091 in words is "two hundred forty-two million, forty thousand, ninety-one".