1243244413 has 6 divisors (see below), whose sum is σ = 1287594074. Its totient is φ = 1200373104.

The previous prime is 1243244411. The next prime is 1243244417. The reversal of 1243244413 is 3144423421.

It can be written as a sum of positive squares in 3 ways, for example, as 465782724 + 777461689 = 21582^2 + 27883^2 .

It is not a de Polignac number, because 1243244413 - 2¹ = 1243244411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243244411) 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 in 5 ways as a sum of consecutive naturals, for example, 738306 + ... + 739987.

Almost surely, 2^1243244413 is an apocalyptic number.

It is an amenable number.

1243244413 is a deficient number, since it is larger than the sum of its proper divisors (44349661).

1243244413 is an equidigital number, since it uses as much as digits as its factorization.

1243244413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478351 (or 1478322 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 1243244413 is about 35259.6711981266. The cubic root of 1243244413 is about 1075.2732423859.

Adding to 1243244413 its reverse (3144423421), we get a palindrome (4387667834).

The spelling of 1243244413 in words is "one billion, two hundred forty-three million, two hundred forty-four thousand, four hundred thirteen".