143221412 has 12 divisors (see below), whose sum is σ = 254746716. Its totient is φ = 70436640.

The previous prime is 143221369. The next prime is 143221451. The reversal of 143221412 is 214122341.

It can be written as a sum of positive squares in 2 ways, for example, as 62473216 + 80748196 = 7904^2 + 8986^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293243 + ... + 293730.

It is an arithmetic number, because the mean of its divisors is an integer number (21228893).

Almost surely, 2^143221412 is an apocalyptic number.

It is an amenable number.

143221412 is a deficient number, since it is larger than the sum of its proper divisors (111525304).

143221412 is a wasteful number, since it uses less digits than its factorization.

143221412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587038 (or 587036 counting only the distinct ones).

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

The square root of 143221412 is about 11967.5148631619. The cubic root of 143221412 is about 523.2019055020.

Adding to 143221412 its reverse (214122341), we get a palindrome (357343753).

The spelling of 143221412 in words is "one hundred forty-three million, two hundred twenty-one thousand, four hundred twelve".