1065304321 has 9 divisors (see below), whose sum is σ = 1077952899. Its totient is φ = 1052803584.

The previous prime is 1065304301. The next prime is 1065304327. The reversal of 1065304321 is 1234035601.

The square root of 1065304321 is 32639.

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., 1048788225 + 16516096 = 32385^2 + 4064^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1065304321 is a prime.

It is a super-2 number, since 2×1065304321² = 2269746592682542082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1065304327) 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, 4145025 + ... + 4145281.

Almost surely, 2^1065304321 is an apocalyptic number.

1065304321 is the 32639-th square number.

1065304321 is the 16320-th centered octagonal number.

It is an amenable number.

1065304321 is a deficient number, since it is larger than the sum of its proper divisors (12648578).

1065304321 is an frugal number, since it uses more digits than its factorization.

1065304321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The cubic root of 1065304321 is about 1021.3107335638.

Multiplying 1065304321 by its sum of digits (25), we get a square (26632608025 = 163195²).

Adding to 1065304321 its reverse (1234035601), we get a palindrome (2299339922).

The spelling of 1065304321 in words is "one billion, sixty-five million, three hundred four thousand, three hundred twenty-one".