1045117321 has 2 divisors, whose sum is σ = 1045117322. Its totient is φ = 1045117320.

The previous prime is 1045117289. The next prime is 1045117343. The reversal of 1045117321 is 1237115401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1011939721 + 33177600 = 31811^2 + 5760^2 .

It is an emirp because it is prime and its reverse (1237115401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1045117321 - 2⁵ = 1045117289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1045117351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522558660 + 522558661.

It is an arithmetic number, because the mean of its divisors is an integer number (522558661).

Almost surely, 2^1045117321 is an apocalyptic number.

It is an amenable number.

1045117321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045117321 is an equidigital number, since it uses as much as digits as its factorization.

1045117321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1045117321 is about 32328.2743275913. The cubic root of 1045117321 is about 1014.8184363048.

It can be divided in two parts, 10451 and 17321, that added together give a palindrome (27772).

The spelling of 1045117321 in words is "one billion, forty-five million, one hundred seventeen thousand, three hundred twenty-one".