243121042 has 8 divisors (see below), whose sum is σ = 365241996. Its totient is φ = 121373712.

The previous prime is 243121037. The next prime is 243121057. The reversal of 243121042 is 240121342.

It can be written as a sum of positive squares in 2 ways, for example, as 238054041 + 5067001 = 15429^2 + 2251^2 .

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

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, 91773 + ... + 94384.

Almost surely, 2^243121042 is an apocalyptic number.

243121042 is a deficient number, since it is larger than the sum of its proper divisors (122120954).

243121042 is a wasteful number, since it uses less digits than its factorization.

243121042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186812.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 243121042 is about 15592.3392087268. The cubic root of 243121042 is about 624.1287418592.

Adding to 243121042 its reverse (240121342), we get a palindrome (483242384).

The spelling of 243121042 in words is "two hundred forty-three million, one hundred twenty-one thousand, forty-two".