143221242 has 16 divisors (see below), whose sum is σ = 287183520. Its totient is φ = 47616912.

The previous prime is 143221237. The next prime is 143221279. The reversal of 143221242 is 242122341.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28348 + ... + 33015.

It is an arithmetic number, because the mean of its divisors is an integer number (17948970).

Almost surely, 2^143221242 is an apocalyptic number.

143221242 is an abundant number, since it is smaller than the sum of its proper divisors (143962278).

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

143221242 is a wasteful number, since it uses less digits than its factorization.

143221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61757.

The product of its digits is 768, while the sum is 21.

The square root of 143221242 is about 11967.5077605991. The cubic root of 143221242 is about 523.2016984930.

Adding to 143221242 its reverse (242122341), we get a palindrome (385343583).

The spelling of 143221242 in words is "one hundred forty-three million, two hundred twenty-one thousand, two hundred forty-two".