242304581 has 2 divisors, whose sum is σ = 242304582. Its totient is φ = 242304580.

The previous prime is 242304571. The next prime is 242304619. The reversal of 242304581 is 185403242.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242300356 + 4225 = 15566^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 242304581 - 2²² = 238110277 is a prime.

It is a super-2 number, since 2×242304581² = 117423019947171122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242304521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121152290 + 121152291.

It is an arithmetic number, because the mean of its divisors is an integer number (121152291).

Almost surely, 2^242304581 is an apocalyptic number.

It is an amenable number.

242304581 is a deficient number, since it is larger than the sum of its proper divisors (1).

242304581 is an equidigital number, since it uses as much as digits as its factorization.

242304581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 242304581 is about 15566.1357118586. The cubic root of 242304581 is about 623.4292983944.

The spelling of 242304581 in words is "two hundred forty-two million, three hundred four thousand, five hundred eighty-one".