1242443412 has 144 divisors (see below), whose sum is σ = 3686592000. Its totient is φ = 352658880.

The previous prime is 1242443407. The next prime is 1242443441. The reversal of 1242443412 is 2143442421.

1242443412 is a `hidden beast` number, since 1 + 2 + 4 + 244 + 3 + 412 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 2950962 + ... + 2951382.

Almost surely, 2^1242443412 is an apocalyptic number.

1242443412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242443412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1843296000).

1242443412 is an abundant number, since it is smaller than the sum of its proper divisors (2444148588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242443412 is a wasteful number, since it uses less digits than its factorization.

1242443412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 672 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

The square root of 1242443412 is about 35248.3107680354. The cubic root of 1242443412 is about 1075.0422660865.

Adding to 1242443412 its reverse (2143442421), we get a palindrome (3385885833).

Subtracting 1242443412 from its reverse (2143442421), we obtain a palindrome (900999009).

The spelling of 1242443412 in words is "one billion, two hundred forty-two million, four hundred forty-three thousand, four hundred twelve".