242665189 has 8 divisors (see below), whose sum is σ = 261491832. Its totient is φ = 223861440.

The previous prime is 242665187. The next prime is 242665229. The reversal of 242665189 is 981566242.

It can be written as a sum of positive squares in 4 ways, for example, as 7656289 + 235008900 = 2767^2 + 15330^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242665189 - 2¹ = 242665187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242665187) 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 7 ways as a sum of consecutive naturals, for example, 20919 + ... + 30379.

It is an arithmetic number, because the mean of its divisors is an integer number (32686479).

Almost surely, 2^242665189 is an apocalyptic number.

It is an amenable number.

242665189 is a deficient number, since it is larger than the sum of its proper divisors (18826643).

242665189 is a wasteful number, since it uses less digits than its factorization.

242665189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11447.

The product of its digits is 207360, while the sum is 43.

The square root of 242665189 is about 15577.7144986034. The cubic root of 242665189 is about 623.7384164445.

The spelling of 242665189 in words is "two hundred forty-two million, six hundred sixty-five thousand, one hundred eighty-nine".