1213243424 has 12 divisors (see below), whose sum is σ = 2388573054. Its totient is φ = 606621696.

The previous prime is 1213243363. The next prime is 1213243433. The reversal of 1213243424 is 4243423121.

It can be written as a sum of positive squares in only one way, i.e., 1188043024 + 25200400 = 34468^2 + 5020^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1213243393 and 1213243402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18956897 + ... + 18956960.

Almost surely, 2^1213243424 is an apocalyptic number.

It is an amenable number.

1213243424 is a deficient number, since it is larger than the sum of its proper divisors (1175329630).

1213243424 is an equidigital number, since it uses as much as digits as its factorization.

1213243424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37913867 (or 37913859 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

The square root of 1213243424 is about 34831.6440036930. The cubic root of 1213243424 is about 1066.5535084821.

Adding to 1213243424 its reverse (4243423121), we get a palindrome (5456666545).

The spelling of 1213243424 in words is "one billion, two hundred thirteen million, two hundred forty-three thousand, four hundred twenty-four".