1224400403 has 2 divisors, whose sum is σ = 1224400404. Its totient is φ = 1224400402.

The previous prime is 1224400393. The next prime is 1224400433. The reversal of 1224400403 is 3040044221.

It is a weak prime.

It is an emirp because it is prime and its reverse (3040044221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1224400403 - 2¹² = 1224396307 is a prime.

It is not a weakly prime, because it can be changed into another prime (1224400433) 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, 612200201 + 612200202.

It is an arithmetic number, because the mean of its divisors is an integer number (612200202).

Almost surely, 2^1224400403 is an apocalyptic number.

1224400403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224400403 is an equidigital number, since it uses as much as digits as its factorization.

1224400403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1224400403 is about 34991.4332801616. The cubic root of 1224400403 is about 1069.8128775756.

Adding to 1224400403 its reverse (3040044221), we get a palindrome (4264444624).

The spelling of 1224400403 in words is "one billion, two hundred twenty-four million, four hundred thousand, four hundred three".