1222461509 has 2 divisors, whose sum is σ = 1222461510. Its totient is φ = 1222461508.

The previous prime is 1222461469. The next prime is 1222461571. The reversal of 1222461509 is 9051642221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1165881025 + 56580484 = 34145^2 + 7522^2 .

It is an emirp because it is prime and its reverse (9051642221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222461509 - 2²⁸ = 954026053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222361509) 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, 611230754 + 611230755.

It is an arithmetic number, because the mean of its divisors is an integer number (611230755).

Almost surely, 2^1222461509 is an apocalyptic number.

It is an amenable number.

1222461509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222461509 is an equidigital number, since it uses as much as digits as its factorization.

1222461509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1222461509 is about 34963.7170363793. The cubic root of 1222461509 is about 1069.2478800415.

The spelling of 1222461509 in words is "one billion, two hundred twenty-two million, four hundred sixty-one thousand, five hundred nine".