1224440257 has 2 divisors, whose sum is σ = 1224440258. Its totient is φ = 1224440256.

The previous prime is 1224440183. The next prime is 1224440279. The reversal of 1224440257 is 7520444221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1002102336 + 222337921 = 31656^2 + 14911^2 .

It is an emirp because it is prime and its reverse (7520444221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224440257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1224440957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612220128 + 612220129.

It is an arithmetic number, because the mean of its divisors is an integer number (612220129).

Almost surely, 2^1224440257 is an apocalyptic number.

It is an amenable number.

1224440257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224440257 is an equidigital number, since it uses as much as digits as its factorization.

1224440257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 31.

The square root of 1224440257 is about 34992.0027577731. The cubic root of 1224440257 is about 1069.8244848515.

Adding to 1224440257 its reverse (7520444221), we get a palindrome (8744884478).

The spelling of 1224440257 in words is "one billion, two hundred twenty-four million, four hundred forty thousand, two hundred fifty-seven".