1243212424 has 16 divisors (see below), whose sum is σ = 2331481500. Its totient is φ = 621484032.

The previous prime is 1243212413. The next prime is 1243212433. The reversal of 1243212424 is 4242123421.

It can be written as a sum of positive squares in 2 ways, for example, as 994140900 + 249071524 = 31530^2 + 15782^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39544 + ... + 63640.

Almost surely, 2^1243212424 is an apocalyptic number.

It is an amenable number.

1243212424 is a deficient number, since it is larger than the sum of its proper divisors (1088269076).

1243212424 is a wasteful number, since it uses less digits than its factorization.

1243212424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30552 (or 30548 counting only the distinct ones).

The product of its digits is 3072, while the sum is 25.

The square root of 1243212424 is about 35259.2175749831. The cubic root of 1243212424 is about 1075.2640199540.

Adding to 1243212424 its reverse (4242123421), we get a palindrome (5485335845).

The spelling of 1243212424 in words is "one billion, two hundred forty-three million, two hundred twelve thousand, four hundred twenty-four".