242546665 has 4 divisors (see below), whose sum is σ = 291056004. Its totient is φ = 194037328.

The previous prime is 242546659. The next prime is 242546677. The reversal of 242546665 is 566645242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566645242 = 2 ⋅283322621.

It can be written as a sum of positive squares in 2 ways, for example, as 93779856 + 148766809 = 9684^2 + 12197^2 .

It is a cyclic number.

It is not a de Polignac number, because 242546665 - 2¹⁵ = 242513897 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24254662 + ... + 24254671.

It is an arithmetic number, because the mean of its divisors is an integer number (72764001).

Almost surely, 2^242546665 is an apocalyptic number.

It is an amenable number.

242546665 is a deficient number, since it is larger than the sum of its proper divisors (48509339).

242546665 is an equidigital number, since it uses as much as digits as its factorization.

242546665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48509338.

The product of its digits is 345600, while the sum is 40.

The square root of 242546665 is about 15573.9097531737. The cubic root of 242546665 is about 623.6368498763.

The spelling of 242546665 in words is "two hundred forty-two million, five hundred forty-six thousand, six hundred sixty-five".