243142012 has 24 divisors (see below), whose sum is σ = 450880640. Its totient is φ = 114404400.

The previous prime is 243142001. The next prime is 243142019. The reversal of 243142012 is 210241342.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243142019) 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, 883 + ... + 22069.

Almost surely, 2^243142012 is an apocalyptic number.

It is an amenable number.

243142012 is a deficient number, since it is larger than the sum of its proper divisors (207738628).

243142012 is a wasteful number, since it uses less digits than its factorization.

243142012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21361 (or 21359 counting only the distinct ones).

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

The square root of 243142012 is about 15593.0116398340. The cubic root of 243142012 is about 624.1466857378.

Adding to 243142012 its reverse (210241342), we get a palindrome (453383354).

The spelling of 243142012 in words is "two hundred forty-three million, one hundred forty-two thousand, twelve".