1143003321 has 24 divisors (see below), whose sum is σ = 1675061960. Its totient is φ = 750974976.

The previous prime is 1143003271. The next prime is 1143003343. The reversal of 1143003321 is 1233003411.

It can be written as a sum of positive squares in 4 ways, for example, as 43086096 + 1099917225 = 6564^2 + 33165^2 .

It is not a de Polignac number, because 1143003321 - 2¹³ = 1142995129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143003294 and 1143003303.

It is not an unprimeable number, because it can be changed into a prime (1143003391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186315 + ... + 192351.

Almost surely, 2^1143003321 is an apocalyptic number.

It is an amenable number.

1143003321 is a deficient number, since it is larger than the sum of its proper divisors (532058639).

1143003321 is a wasteful number, since it uses less digits than its factorization.

1143003321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6345 (or 6342 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1143003321 is about 33808.3321239011. The cubic root of 1143003321 is about 1045.5604911251.

Adding to 1143003321 its reverse (1233003411), we get a palindrome (2376006732).

The spelling of 1143003321 in words is "one billion, one hundred forty-three million, three thousand, three hundred twenty-one".