1320421443 has 16 divisors (see below), whose sum is σ = 1935280512. Its totient is φ = 794144000.

The previous prime is 1320421439. The next prime is 1320421457. The reversal of 1320421443 is 3441240231.

It is a cyclic number.

It is not a de Polignac number, because 1320421443 - 2² = 1320421439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320421493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148398 + ... + 157043.

It is an arithmetic number, because the mean of its divisors is an integer number (120955032).

Almost surely, 2^1320421443 is an apocalyptic number.

1320421443 is a deficient number, since it is larger than the sum of its proper divisors (614859069).

1320421443 is a wasteful number, since it uses less digits than its factorization.

1320421443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305586.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1320421443 is about 36337.6037047024. The cubic root of 1320421443 is about 1097.0780421717.

Adding to 1320421443 its reverse (3441240231), we get a palindrome (4761661674).

The spelling of 1320421443 in words is "one billion, three hundred twenty million, four hundred twenty-one thousand, four hundred forty-three".