1240244417 has 2 divisors, whose sum is σ = 1240244418. Its totient is φ = 1240244416.

The previous prime is 1240244407. The next prime is 1240244443. The reversal of 1240244417 is 7144420421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1157088256 + 83156161 = 34016^2 + 9119^2 .

It is an emirp because it is prime and its reverse (7144420421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240244417 - 2¹⁰ = 1240243393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1240244417.

It is not a weakly prime, because it can be changed into another prime (1240244407) 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, 620122208 + 620122209.

It is an arithmetic number, because the mean of its divisors is an integer number (620122209).

Almost surely, 2^1240244417 is an apocalyptic number.

It is an amenable number.

1240244417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240244417 is an equidigital number, since it uses as much as digits as its factorization.

1240244417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 1240244417 is about 35217.1040405085. The cubic root of 1240244417 is about 1074.4076540516.

Adding to 1240244417 its reverse (7144420421), we get a palindrome (8384664838).

The spelling of 1240244417 in words is "one billion, two hundred forty million, two hundred forty-four thousand, four hundred seventeen".