1320342321 has 16 divisors (see below), whose sum is σ = 1769243904. Its totient is φ = 875846784.

The previous prime is 1320342293. The next prime is 1320342343. The reversal of 1320342321 is 1232430231.

It is not a de Polignac number, because 1320342321 - 2²⁵ = 1286787889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320392321) 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, 612181 + ... + 614333.

It is an arithmetic number, because the mean of its divisors is an integer number (110577744).

Almost surely, 2^1320342321 is an apocalyptic number.

It is an amenable number.

1320342321 is a deficient number, since it is larger than the sum of its proper divisors (448901583).

1320342321 is a wasteful number, since it uses less digits than its factorization.

1320342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1320342321 is about 36336.5149814894. The cubic root of 1320342321 is about 1097.0561287785.

Adding to 1320342321 its reverse (1232430231), we get a palindrome (2552772552).

The spelling of 1320342321 in words is "one billion, three hundred twenty million, three hundred forty-two thousand, three hundred twenty-one".