1205563273 has 2 divisors, whose sum is σ = 1205563274. Its totient is φ = 1205563272.

The previous prime is 1205563259. The next prime is 1205563349. The reversal of 1205563273 is 3723655021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817788409 + 387774864 = 28597^2 + 19692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205563273 - 2⁵ = 1205563241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1205563223) 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, 602781636 + 602781637.

It is an arithmetic number, because the mean of its divisors is an integer number (602781637).

Almost surely, 2^1205563273 is an apocalyptic number.

It is an amenable number.

1205563273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205563273 is an equidigital number, since it uses as much as digits as its factorization.

1205563273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 1205563273 is about 34721.2222279113. Note that the first 5 decimals coincide. The cubic root of 1205563273 is about 1064.2982212021.

The spelling of 1205563273 in words is "one billion, two hundred five million, five hundred sixty-three thousand, two hundred seventy-three".