1224004013 has 2 divisors, whose sum is σ = 1224004014. Its totient is φ = 1224004012.

The previous prime is 1224004009. The next prime is 1224004021. The reversal of 1224004013 is 3104004221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1222411369 + 1592644 = 34963^2 + 1262^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224004013 - 2² = 1224004009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1224003982 and 1224004000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224004513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612002006 + 612002007.

It is an arithmetic number, because the mean of its divisors is an integer number (612002007).

Almost surely, 2^1224004013 is an apocalyptic number.

It is an amenable number.

1224004013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224004013 is an equidigital number, since it uses as much as digits as its factorization.

1224004013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1224004013 is about 34985.7687210100. The cubic root of 1224004013 is about 1069.6974172801.

Adding to 1224004013 its reverse (3104004221), we get a palindrome (4328008234).

The spelling of 1224004013 in words is "one billion, two hundred twenty-four million, four thousand, thirteen".