1323120143 has 12 divisors (see below), whose sum is σ = 1381859784. Its totient is φ = 1266408000.

The previous prime is 1323120133. The next prime is 1323120187. The reversal of 1323120143 is 3410213231.

It is not a de Polignac number, because 1323120143 - 2²⁰ = 1322071567 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 (1323120133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81668 + ... + 96518.

It is an arithmetic number, because the mean of its divisors is an integer number (115154982).

Almost surely, 2^1323120143 is an apocalyptic number.

1323120143 is a deficient number, since it is larger than the sum of its proper divisors (58739641).

1323120143 is an equidigital number, since it uses as much as digits as its factorization.

1323120143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14986 (or 14945 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1323120143 is about 36374.7184593915. The cubic root of 1323120143 is about 1097.8249425351.

Adding to 1323120143 its reverse (3410213231), we get a palindrome (4733333374).

The spelling of 1323120143 in words is "one billion, three hundred twenty-three million, one hundred twenty thousand, one hundred forty-three".