243102042 has 48 divisors (see below), whose sum is σ = 555055488. Its totient is φ = 76744800.

The previous prime is 243102029. The next prime is 243102053. The reversal of 243102042 is 240201342.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39792 + ... + 45492.

It is an arithmetic number, because the mean of its divisors is an integer number (11563656).

Almost surely, 2^243102042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243102042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277527744).

243102042 is an abundant number, since it is smaller than the sum of its proper divisors (311953446).

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

243102042 is a wasteful number, since it uses less digits than its factorization.

243102042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835 (or 5832 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 243102042 is about 15591.7299232638. The cubic root of 243102042 is about 624.1124828044.

Adding to 243102042 its reverse (240201342), we get a palindrome (483303384).

The spelling of 243102042 in words is "two hundred forty-three million, one hundred two thousand, forty-two".