1205517133 has 2 divisors, whose sum is σ = 1205517134. Its totient is φ = 1205517132.

The previous prime is 1205517059. The next prime is 1205517139. The reversal of 1205517133 is 3317155021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 958335849 + 247181284 = 30957^2 + 15722^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205517133 - 2⁹ = 1205516621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205517139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602758566 + 602758567.

It is an arithmetic number, because the mean of its divisors is an integer number (602758567).

Almost surely, 2^1205517133 is an apocalyptic number.

It is an amenable number.

1205517133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205517133 is an equidigital number, since it uses as much as digits as its factorization.

1205517133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 1205517133 is about 34720.5577864181. The cubic root of 1205517133 is about 1064.2846432209.

The spelling of 1205517133 in words is "one billion, two hundred five million, five hundred seventeen thousand, one hundred thirty-three".