1224720443 has 6 divisors (see below), whose sum is σ = 1301000916. Its totient is φ = 1152677792.

The previous prime is 1224720433. The next prime is 1224720451. The reversal of 1224720443 is 3440274221.

It is not a de Polignac number, because 1224720443 - 2⁸ = 1224720187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224720433) 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, 2118605 + ... + 2119182.

It is an arithmetic number, because the mean of its divisors is an integer number (216833486).

Almost surely, 2^1224720443 is an apocalyptic number.

1224720443 is a deficient number, since it is larger than the sum of its proper divisors (76280473).

1224720443 is an equidigital number, since it uses as much as digits as its factorization.

1224720443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4237821 (or 4237804 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 1224720443 is about 34996.0061006967. The cubic root of 1224720443 is about 1069.9060804978.

Adding to 1224720443 its reverse (3440274221), we get a palindrome (4664994664).

The spelling of 1224720443 in words is "one billion, two hundred twenty-four million, seven hundred twenty thousand, four hundred forty-three".