1165471321 has 9 divisors (see below), whose sum is σ = 1356030399. Its totient is φ = 998770584.

The previous prime is 1165471313. The next prime is 1165471331. The reversal of 1165471321 is 1231745611.

The square root of 1165471321 is 34139.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 322382025 + 843089296 = 17955^2 + 29036^2 .

It is not a de Polignac number, because 1165471321 - 2³ = 1165471313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165471331) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 236535 + ... + 241411.

Almost surely, 2^1165471321 is an apocalyptic number.

1165471321 is the 34139-th square number.

1165471321 is the 17070-th centered octagonal number.

It is an amenable number.

1165471321 is a deficient number, since it is larger than the sum of its proper divisors (190559078).

1165471321 is an frugal number, since it uses more digits than its factorization.

1165471321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9768 (or 4884 counting only the distinct ones).

The product of its digits is 5040, while the sum is 31.

The cubic root of 1165471321 is about 1052.3669418402.

The spelling of 1165471321 in words is "one billion, one hundred sixty-five million, four hundred seventy-one thousand, three hundred twenty-one".