243140542 has 8 divisors (see below), whose sum is σ = 374567976. Its totient is φ = 118284552.

The previous prime is 243140539. The next prime is 243140543. The reversal of 243140542 is 245041342.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243140543) 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, 1642768 + ... + 1642915.

It is an arithmetic number, because the mean of its divisors is an integer number (46820997).

Almost surely, 2^243140542 is an apocalyptic number.

243140542 is a deficient number, since it is larger than the sum of its proper divisors (131427434).

243140542 is a wasteful number, since it uses less digits than its factorization.

243140542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3285722.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 243140542 is about 15592.9645032624. The cubic root of 243140542 is about 624.1454279030.

Adding to 243140542 its reverse (245041342), we get a palindrome (488181884).

The spelling of 243140542 in words is "two hundred forty-three million, one hundred forty thousand, five hundred forty-two".