1205561207 has 2 divisors, whose sum is σ = 1205561208. Its totient is φ = 1205561206.

The previous prime is 1205561173. The next prime is 1205561237. The reversal of 1205561207 is 7021655021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1205561207 - 2¹⁶ = 1205495671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1205561207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205561237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602780603 + 602780604.

It is an arithmetic number, because the mean of its divisors is an integer number (602780604).

Almost surely, 2^1205561207 is an apocalyptic number.

1205561207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205561207 is an equidigital number, since it uses as much as digits as its factorization.

1205561207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 1205561207 is about 34721.1924766417. The cubic root of 1205561207 is about 1064.2976132314.

The spelling of 1205561207 in words is "one billion, two hundred five million, five hundred sixty-one thousand, two hundred seven".