1321442303 has 4 divisors (see below), whose sum is σ = 1324892928. Its totient is φ = 1317991680.

The previous prime is 1321442279. The next prime is 1321442321. The reversal of 1321442303 is 3032441231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1321442303 - 2²² = 1317247999 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 (1321442323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1724738 + ... + 1725503.

It is an arithmetic number, because the mean of its divisors is an integer number (331223232).

Almost surely, 2^1321442303 is an apocalyptic number.

1321442303 is a deficient number, since it is larger than the sum of its proper divisors (3450625).

1321442303 is an equidigital number, since it uses as much as digits as its factorization.

1321442303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450624.

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

The square root of 1321442303 is about 36351.6478718641. The cubic root of 1321442303 is about 1097.3606980347.

Adding to 1321442303 its reverse (3032441231), we get a palindrome (4353883534).

The spelling of 1321442303 in words is "one billion, three hundred twenty-one million, four hundred forty-two thousand, three hundred three".