243123142 has 16 divisors (see below), whose sum is σ = 381612672. Its totient is φ = 116026560.

The previous prime is 243123119. The next prime is 243123143. The reversal of 243123142 is 241321342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243123143) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 22333 + ... + 31384.

It is an arithmetic number, because the mean of its divisors is an integer number (23850792).

Almost surely, 2^243123142 is an apocalyptic number.

243123142 is a deficient number, since it is larger than the sum of its proper divisors (138489530).

243123142 is a wasteful number, since it uses less digits than its factorization.

243123142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53823.

The product of its digits is 1152, while the sum is 22.

The square root of 243123142 is about 15592.4065493432. The cubic root of 243123142 is about 624.1305388606.

Adding to 243123142 its reverse (241321342), we get a palindrome (484444484).

The spelling of 243123142 in words is "two hundred forty-three million, one hundred twenty-three thousand, one hundred forty-two".