1211286563 has 2 divisors, whose sum is σ = 1211286564. Its totient is φ = 1211286562.

The previous prime is 1211286523. The next prime is 1211286581. The reversal of 1211286563 is 3656821121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211286563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211286523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605643281 + 605643282.

It is an arithmetic number, because the mean of its divisors is an integer number (605643282).

Almost surely, 2^1211286563 is an apocalyptic number.

1211286563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211286563 is an equidigital number, since it uses as much as digits as its factorization.

1211286563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 1211286563 is about 34803.5423915440. The cubic root of 1211286563 is about 1065.9797791339.

The spelling of 1211286563 in words is "one billion, two hundred eleven million, two hundred eighty-six thousand, five hundred sixty-three".