243140242 has 8 divisors (see below), whose sum is σ = 366600636. Its totient is φ = 120940032.

The previous prime is 243140237. The next prime is 243140243. The reversal of 243140242 is 242041342.

It is a happy number.

243140242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 206525641 + 36614601 = 14371^2 + 6051^2 .

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

It is not an unprimeable number, because it can be changed into a prime (243140243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314563 + ... + 315334.

Almost surely, 2^243140242 is an apocalyptic number.

243140242 is a deficient number, since it is larger than the sum of its proper divisors (123460394).

243140242 is a wasteful number, since it uses less digits than its factorization.

243140242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630092.

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

The square root of 243140242 is about 15592.9548835363. The cubic root of 243140242 is about 624.1451712014.

Adding to 243140242 its reverse (242041342), we get a palindrome (485181584).

The spelling of 243140242 in words is "two hundred forty-three million, one hundred forty thousand, two hundred forty-two".