143342321 has 8 divisors (see below), whose sum is σ = 144969000. Its totient is φ = 141724800.

The previous prime is 143342281. The next prime is 143342347. The reversal of 143342321 is 123243341.

143342321 is digitally balanced in base 2, 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 4 ways, for example, as 3748096 + 139594225 = 1936^2 + 11815^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143342321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143342021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32021 + ... + 36221.

It is an arithmetic number, because the mean of its divisors is an integer number (18121125).

Almost surely, 2^143342321 is an apocalyptic number.

It is an amenable number.

143342321 is a deficient number, since it is larger than the sum of its proper divisors (1626679).

143342321 is a wasteful number, since it uses less digits than its factorization.

143342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4579.

The product of its digits is 1728, while the sum is 23.

The square root of 143342321 is about 11972.5653474934. The cubic root of 143342321 is about 523.3490949134.

Adding to 143342321 its reverse (123243341), we get a palindrome (266585662).

The spelling of 143342321 in words is "one hundred forty-three million, three hundred forty-two thousand, three hundred twenty-one".