4320321065 has 16 divisors (see below), whose sum is σ = 5200813200. Its totient is φ = 3445327872.

The previous prime is 4320321029. The next prime is 4320321091. The reversal of 4320321065 is 5601230234.

It can be written as a sum of positive squares in 8 ways, for example, as 119596096 + 4200724969 = 10936^2 + 64813^2 .

It is a cyclic number.

It is not a de Polignac number, because 4320321065 - 2³⁰ = 3246579241 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4181789 + ... + 4182821.

It is an arithmetic number, because the mean of its divisors is an integer number (325050825).

Almost surely, 2^4320321065 is an apocalyptic number.

It is an amenable number.

4320321065 is a deficient number, since it is larger than the sum of its proper divisors (880492135).

4320321065 is a wasteful number, since it uses less digits than its factorization.

4320321065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 4320321065 is about 65729.1492794483. The cubic root of 4320321065 is about 1628.6909163876.

Adding to 4320321065 its reverse (5601230234), we get a palindrome (9921551299).

The spelling of 4320321065 in words is "four billion, three hundred twenty million, three hundred twenty-one thousand, sixty-five".