143121242 has 32 divisors (see below), whose sum is σ = 242440128. Its totient is φ = 62800000.

The previous prime is 143121239. The next prime is 143121247. The reversal of 143121242 is 242121341.

It is not an unprimeable number, because it can be changed into a prime (143121247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90317 + ... + 91887.

It is an arithmetic number, because the mean of its divisors is an integer number (7576254).

Almost surely, 2^143121242 is an apocalyptic number.

143121242 is a deficient number, since it is larger than the sum of its proper divisors (99318886).

143121242 is a wasteful number, since it uses less digits than its factorization.

143121242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726.

The product of its digits is 384, while the sum is 20.

The square root of 143121242 is about 11963.3290517314. The cubic root of 143121242 is about 523.0799000995.

Adding to 143121242 its reverse (242121341), we get a palindrome (385242583).

Subtracting 143121242 from its reverse (242121341), we obtain a palindrome (99000099).

The spelling of 143121242 in words is "one hundred forty-three million, one hundred twenty-one thousand, two hundred forty-two".