143781812 has 6 divisors (see below), whose sum is σ = 251618178. Its totient is φ = 71890904.

The previous prime is 143781787. The next prime is 143781821. The reversal of 143781812 is 218187341.

143781812 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 133310116 + 10471696 = 11546^2 + 3236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17972723 + ... + 17972730.

It is an arithmetic number, because the mean of its divisors is an integer number (41936363).

Almost surely, 2^143781812 is an apocalyptic number.

It is an amenable number.

143781812 is a deficient number, since it is larger than the sum of its proper divisors (107836366).

143781812 is a wasteful number, since it uses less digits than its factorization.

143781812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35945457 (or 35945455 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 143781812 is about 11990.9053870006. The cubic root of 143781812 is about 523.8834161705.

The spelling of 143781812 in words is "one hundred forty-three million, seven hundred eighty-one thousand, eight hundred twelve".