243142642 has 8 divisors (see below), whose sum is σ = 364780332. Its totient is φ = 121549200.

The previous prime is 243142631. The next prime is 243142657. The reversal of 243142642 is 246241342.

It can be written as a sum of positive squares in 2 ways, for example, as 241771401 + 1371241 = 15549^2 + 1171^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 243142642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14392 + ... + 26332.

Almost surely, 2^243142642 is an apocalyptic number.

243142642 is a deficient number, since it is larger than the sum of its proper divisors (121637690).

243142642 is a wasteful number, since it uses less digits than its factorization.

243142642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22124.

The product of its digits is 9216, while the sum is 28.

The square root of 243142642 is about 15593.0318411783. The cubic root of 243142642 is about 624.1472248084.

Adding to 243142642 its reverse (246241342), we get a palindrome (489383984).

The spelling of 243142642 in words is "two hundred forty-three million, one hundred forty-two thousand, six hundred forty-two".