143442321 has 16 divisors (see below), whose sum is σ = 210714048. Its totient is φ = 86072000.

The previous prime is 143442307. The next prime is 143442331. The reversal of 143442321 is 123244341.

It is a cyclic number.

It is not a de Polignac number, because 143442321 - 2⁵ = 143442289 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 143442291 and 143442300.

It is not an unprimeable number, because it can be changed into a prime (143442331) 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, 18186 + ... + 24851.

It is an arithmetic number, because the mean of its divisors is an integer number (13169628).

Almost surely, 2^143442321 is an apocalyptic number.

143442321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143442321 is a deficient number, since it is larger than the sum of its proper divisors (67271727).

143442321 is a wasteful number, since it uses less digits than its factorization.

143442321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43152.

The product of its digits is 2304, while the sum is 24.

The square root of 143442321 is about 11976.7408337995. The cubic root of 143442321 is about 523.4707680841.

Adding to 143442321 its reverse (123244341), we get a palindrome (266686662).

The spelling of 143442321 in words is "one hundred forty-three million, four hundred forty-two thousand, three hundred twenty-one".