1145545217 has 2 divisors, whose sum is σ = 1145545218. Its totient is φ = 1145545216.

The previous prime is 1145545189. The next prime is 1145545231. The reversal of 1145545217 is 7125455411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1145416336 + 128881 = 33844^2 + 359^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145545217 - 2¹⁶ = 1145479681 is a prime.

It is not a weakly prime, because it can be changed into another prime (1145545237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572772608 + 572772609.

It is an arithmetic number, because the mean of its divisors is an integer number (572772609).

Almost surely, 2^1145545217 is an apocalyptic number.

It is an amenable number.

1145545217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145545217 is an equidigital number, since it uses as much as digits as its factorization.

1145545217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28000, while the sum is 35.

The square root of 1145545217 is about 33845.9039914729. The cubic root of 1145545217 is about 1046.3349824081.

The spelling of 1145545217 in words is "one billion, one hundred forty-five million, five hundred forty-five thousand, two hundred seventeen".