1243244401 has 16 divisors (see below), whose sum is σ = 1451520000. Its totient is φ = 1042801488.

The previous prime is 1243244399. The next prime is 1243244407. The reversal of 1243244401 is 1044423421.

It is a cyclic number.

It is not a de Polignac number, because 1243244401 - 2¹ = 1243244399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1243244407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85350 + ... + 98848.

It is an arithmetic number, because the mean of its divisors is an integer number (90720000).

Almost surely, 2^1243244401 is an apocalyptic number.

It is an amenable number.

1243244401 is a deficient number, since it is larger than the sum of its proper divisors (208275599).

1243244401 is a wasteful number, since it uses less digits than its factorization.

1243244401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13788.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1243244401 is about 35259.6710279605. The cubic root of 1243244401 is about 1075.2732389263.

Adding to 1243244401 its reverse (1044423421), we get a palindrome (2287667822).

The spelling of 1243244401 in words is "one billion, two hundred forty-three million, two hundred forty-four thousand, four hundred one".