1242243312 has 40 divisors (see below), whose sum is σ = 3397903056. Its totient is φ = 389723136.

The previous prime is 1242243311. The next prime is 1242243347. The reversal of 1242243312 is 2133422421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242243311) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 760363 + ... + 761994.

Almost surely, 2^1242243312 is an apocalyptic number.

1242243312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1242243312 is an abundant number, since it is smaller than the sum of its proper divisors (2155659744).

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

1242243312 is a wasteful number, since it uses less digits than its factorization.

1242243312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522385 (or 1522379 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 1242243312 is about 35245.4722198469. The cubic root of 1242243312 is about 1074.9845498410.

Adding to 1242243312 its reverse (2133422421), we get a palindrome (3375665733).

The spelling of 1242243312 in words is "one billion, two hundred forty-two million, two hundred forty-three thousand, three hundred twelve".