1143432321 has 16 divisors (see below), whose sum is σ = 1542328128. Its totient is φ = 753459200.

The previous prime is 1143432317. The next prime is 1143432337. The reversal of 1143432321 is 1232343411.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1143432321 - 2² = 1143432317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1143432291 and 1143432300.

It is not an unprimeable number, because it can be changed into a prime (1143432371) 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 15 ways as a sum of consecutive naturals, for example, 95341 + ... + 106661.

It is an arithmetic number, because the mean of its divisors is an integer number (96395508).

Almost surely, 2^1143432321 is an apocalyptic number.

It is an amenable number.

1143432321 is a deficient number, since it is larger than the sum of its proper divisors (398895807).

1143432321 is a wasteful number, since it uses less digits than its factorization.

1143432321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11712.

The product of its digits is 1728, while the sum is 24.

The square root of 1143432321 is about 33814.6761185140. The cubic root of 1143432321 is about 1045.6912837884.

Adding to 1143432321 its reverse (1232343411), we get a palindrome (2375775732).

The spelling of 1143432321 in words is "one billion, one hundred forty-three million, four hundred thirty-two thousand, three hundred twenty-one".