143444021 has 12 divisors (see below), whose sum is σ = 167356332. Its totient is φ = 122588928.

The previous prime is 143444009. The next prime is 143444027. The reversal of 143444021 is 120444341.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44222500 + 99221521 = 6650^2 + 9961^2 .

It is a de Polignac number, because none of the positive numbers 2^k-143444021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143444027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13151 + ... + 21443.

It is an arithmetic number, because the mean of its divisors is an integer number (13946361).

Almost surely, 2^143444021 is an apocalyptic number.

It is an amenable number.

143444021 is a deficient number, since it is larger than the sum of its proper divisors (23912311).

143444021 is an equidigital number, since it uses as much as digits as its factorization.

143444021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8660 (or 8653 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 143444021 is about 11976.8118044829. The cubic root of 143444021 is about 523.4728360391.

Adding to 143444021 its reverse (120444341), we get a palindrome (263888362).

The spelling of 143444021 in words is "one hundred forty-three million, four hundred forty-four thousand, twenty-one".