1222017257 has 2 divisors, whose sum is σ = 1222017258. Its totient is φ = 1222017256.

The previous prime is 1222017169. The next prime is 1222017287. The reversal of 1222017257 is 7527102221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 695957161 + 526060096 = 26381^2 + 22936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222017257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222017287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611008628 + 611008629.

It is an arithmetic number, because the mean of its divisors is an integer number (611008629).

Almost surely, 2^1222017257 is an apocalyptic number.

It is an amenable number.

1222017257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222017257 is an equidigital number, since it uses as much as digits as its factorization.

1222017257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 1222017257 is about 34957.3634160244. The cubic root of 1222017257 is about 1069.1183400222.

Adding to 1222017257 its reverse (7527102221), we get a palindrome (8749119478).

The spelling of 1222017257 in words is "one billion, two hundred twenty-two million, seventeen thousand, two hundred fifty-seven".