243145242 has 24 divisors (see below), whose sum is σ = 554542560. Its totient is φ = 76782600.

The previous prime is 243145229. The next prime is 243145249. The reversal of 243145242 is 242541342.

It is not an unprimeable number, because it can be changed into a prime (243145249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 355134 + ... + 355817.

It is an arithmetic number, because the mean of its divisors is an integer number (23105940).

Almost surely, 2^243145242 is an apocalyptic number.

243145242 is an abundant number, since it is smaller than the sum of its proper divisors (311397318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243145242 is a wasteful number, since it uses less digits than its factorization.

243145242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710978 (or 710975 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 243145242 is about 15593.1152115285. The cubic root of 243145242 is about 624.1494495340.

Adding to 243145242 its reverse (242541342), we get a palindrome (485686584).

The spelling of 243145242 in words is "two hundred forty-three million, one hundred forty-five thousand, two hundred forty-two".