443121142 has 4 divisors (see below), whose sum is σ = 664681716. Its totient is φ = 221560570.

The previous prime is 443121109. The next prime is 443121143. The reversal of 443121142 is 241121344.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443121143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110780284 + ... + 110780287.

It is an arithmetic number, because the mean of its divisors is an integer number (166170429).

Almost surely, 2^443121142 is an apocalyptic number.

443121142 is a deficient number, since it is larger than the sum of its proper divisors (221560574).

443121142 is a wasteful number, since it uses less digits than its factorization.

443121142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221560573.

The product of its digits is 768, while the sum is 22.

The square root of 443121142 is about 21050.4427981931. The cubic root of 443121142 is about 762.3846738418.

Adding to 443121142 its reverse (241121344), we get a palindrome (684242486).

It can be divided in two parts, 44312 and 1142, that added together give a palindrome (45454).

The spelling of 443121142 in words is "four hundred forty-three million, one hundred twenty-one thousand, one hundred forty-two".