1243220324 has 12 divisors (see below), whose sum is σ = 2176765500. Its totient is φ = 621287328.

The previous prime is 1243220269. The next prime is 1243220339. The reversal of 1243220324 is 4230223421.

It can be written as a sum of positive squares in 2 ways, for example, as 792422500 + 450797824 = 28150^2 + 21232^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1243220324.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71939 + ... + 87530.

It is an arithmetic number, because the mean of its divisors is an integer number (181397125).

Almost surely, 2^1243220324 is an apocalyptic number.

It is an amenable number.

1243220324 is a deficient number, since it is larger than the sum of its proper divisors (933545176).

1243220324 is a wasteful number, since it uses less digits than its factorization.

1243220324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161422 (or 161420 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1243220324 is about 35259.3296022485. The cubic root of 1243220324 is about 1075.2662975395.

Adding to 1243220324 its reverse (4230223421), we get a palindrome (5473443745).

The spelling of 1243220324 in words is "one billion, two hundred forty-three million, two hundred twenty thousand, three hundred twenty-four".