243242041 has 16 divisors (see below), whose sum is σ = 282240000. Its totient is φ = 205323408.

The previous prime is 243242039. The next prime is 243242071. The reversal of 243242041 is 140242342.

It is a happy number.

It is not a de Polignac number, because 243242041 - 2¹ = 243242039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243242071) 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 15 ways as a sum of consecutive naturals, for example, 289500 + ... + 290338.

It is an arithmetic number, because the mean of its divisors is an integer number (17640000).

Almost surely, 2^243242041 is an apocalyptic number.

It is an amenable number.

243242041 is a deficient number, since it is larger than the sum of its proper divisors (38997959).

243242041 is an equidigital number, since it uses as much as digits as its factorization.

243242041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 243242041 is about 15596.2188045693. The cubic root of 243242041 is about 624.2322656405.

Adding to 243242041 its reverse (140242342), we get a palindrome (383484383).

The spelling of 243242041 in words is "two hundred forty-three million, two hundred forty-two thousand, forty-one".