1326165321 has 8 divisors (see below), whose sum is σ = 1904237440. Its totient is φ = 816101712.

The previous prime is 1326165307. The next prime is 1326165353. The reversal of 1326165321 is 1235616231.

1326165321 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1326165321 - 2¹⁰ = 1326164297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1326165221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17002081 + ... + 17002158.

It is an arithmetic number, because the mean of its divisors is an integer number (238029680).

Almost surely, 2^1326165321 is an apocalyptic number.

It is an amenable number.

1326165321 is a deficient number, since it is larger than the sum of its proper divisors (578072119).

1326165321 is a wasteful number, since it uses less digits than its factorization.

1326165321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34004255.

The product of its digits is 6480, while the sum is 30.

The square root of 1326165321 is about 36416.5528434529. The cubic root of 1326165321 is about 1098.6665166348. Note that the first 3 decimals are identical.

The spelling of 1326165321 in words is "one billion, three hundred twenty-six million, one hundred sixty-five thousand, three hundred twenty-one".