1205853017 has 2 divisors, whose sum is σ = 1205853018. Its totient is φ = 1205853016.

The previous prime is 1205852987. The next prime is 1205853023. The reversal of 1205853017 is 7103585021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1005460681 + 200392336 = 31709^2 + 14156^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205853017 - 2⁶ = 1205852953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1205853617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602926508 + 602926509.

It is an arithmetic number, because the mean of its divisors is an integer number (602926509).

Almost surely, 2^1205853017 is an apocalyptic number.

It is an amenable number.

1205853017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205853017 is an equidigital number, since it uses as much as digits as its factorization.

1205853017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 1205853017 is about 34725.3944110071. The cubic root of 1205853017 is about 1064.3834785335.

The spelling of 1205853017 in words is "one billion, two hundred five million, eight hundred fifty-three thousand, seventeen".