1145243173 has 2 divisors, whose sum is σ = 1145243174. Its totient is φ = 1145243172.

The previous prime is 1145243093. The next prime is 1145243179. The reversal of 1145243173 is 3713425411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1074397284 + 70845889 = 32778^2 + 8417^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145243173 - 2⁹ = 1145242661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145243179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572621586 + 572621587.

It is an arithmetic number, because the mean of its divisors is an integer number (572621587).

Almost surely, 2^1145243173 is an apocalyptic number.

It is an amenable number.

1145243173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145243173 is an equidigital number, since it uses as much as digits as its factorization.

1145243173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 1145243173 is about 33841.4416507335. The cubic root of 1145243173 is about 1046.2430125236.

Adding to 1145243173 its reverse (3713425411), we get a palindrome (4858668584).

The spelling of 1145243173 in words is "one billion, one hundred forty-five million, two hundred forty-three thousand, one hundred seventy-three".