1028171321 has 2 divisors, whose sum is σ = 1028171322. Its totient is φ = 1028171320.

The previous prime is 1028171317. The next prime is 1028171341. The reversal of 1028171321 is 1231718201.

1028171321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 914215696 + 113955625 = 30236^2 + 10675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028171321 - 2² = 1028171317 is a prime.

It is not a weakly prime, because it can be changed into another prime (1028171341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514085660 + 514085661.

It is an arithmetic number, because the mean of its divisors is an integer number (514085661).

Almost surely, 2^1028171321 is an apocalyptic number.

It is an amenable number.

1028171321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028171321 is an equidigital number, since it uses as much as digits as its factorization.

1028171321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 1028171321 is about 32065.1106500508. The cubic root of 1028171321 is about 1009.3036146559.

Adding to 1028171321 its reverse (1231718201), we get a palindrome (2259889522).

The spelling of 1028171321 in words is "one billion, twenty-eight million, one hundred seventy-one thousand, three hundred twenty-one".