1205321263 has 2 divisors, whose sum is σ = 1205321264. Its totient is φ = 1205321262.

The previous prime is 1205321231. The next prime is 1205321291. The reversal of 1205321263 is 3621235021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1205321263 - 2⁵ = 1205321231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205321963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602660631 + 602660632.

It is an arithmetic number, because the mean of its divisors is an integer number (602660632).

Almost surely, 2^1205321263 is an apocalyptic number.

1205321263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205321263 is an equidigital number, since it uses as much as digits as its factorization.

1205321263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1205321263 is about 34717.7370086243. The cubic root of 1205321263 is about 1064.2269991558.

Adding to 1205321263 its reverse (3621235021), we get a palindrome (4826556284).

The spelling of 1205321263 in words is "one billion, two hundred five million, three hundred twenty-one thousand, two hundred sixty-three".