242865841 has 4 divisors (see below), whose sum is σ = 242919972. Its totient is φ = 242811712.

The previous prime is 242865793. The next prime is 242865869. The reversal of 242865841 is 148568242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 148568242 = 2 ⋅74284121.

It can be written as a sum of positive squares in 2 ways, for example, as 122744241 + 120121600 = 11079^2 + 10960^2 .

It is a cyclic number.

It is not a de Polignac number, because 242865841 - 2¹¹ = 242863793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242865794 and 242865803.

It is not an unprimeable number, because it can be changed into a prime (242865871) 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, 19660 + ... + 29533.

It is an arithmetic number, because the mean of its divisors is an integer number (60729993).

Almost surely, 2^242865841 is an apocalyptic number.

It is an amenable number.

242865841 is a deficient number, since it is larger than the sum of its proper divisors (54131).

242865841 is an equidigital number, since it uses as much as digits as its factorization.

242865841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54130.

The product of its digits is 122880, while the sum is 40.

The square root of 242865841 is about 15584.1535220877. The cubic root of 242865841 is about 623.9102854598.

The spelling of 242865841 in words is "two hundred forty-two million, eight hundred sixty-five thousand, eight hundred forty-one".