1222649557 has 2 divisors, whose sum is σ = 1222649558. Its totient is φ = 1222649556.

The previous prime is 1222649521. The next prime is 1222649627. The reversal of 1222649557 is 7559462221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1178480241 + 44169316 = 34329^2 + 6646^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222649557 - 2⁷ = 1222649429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222649957) 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, 611324778 + 611324779.

It is an arithmetic number, because the mean of its divisors is an integer number (611324779).

Almost surely, 2^1222649557 is an apocalyptic number.

It is an amenable number.

1222649557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222649557 is an equidigital number, since it uses as much as digits as its factorization.

1222649557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 43.

The square root of 1222649557 is about 34966.4061207325. The cubic root of 1222649557 is about 1069.3027037489.

The spelling of 1222649557 in words is "one billion, two hundred twenty-two million, six hundred forty-nine thousand, five hundred fifty-seven".