1242343242140 has 384 divisors, whose sum is σ = 3554340894720. Its totient is φ = 352221696000.

The previous prime is 1242343242071. The next prime is 1242343242157. The reversal of 1242343242140 is 412423432421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1242343242097 and 1242343242106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 463041239 + ... + 463043921.

It is an arithmetic number, because the mean of its divisors is an integer number (9256096080).

Almost surely, 2^{1242343242140} is an apocalyptic number.

1242343242140 is a gapful number since it is divisible by the number (10) 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 1242343242140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1777170447360).

1242343242140 is an abundant number, since it is smaller than the sum of its proper divisors (2311997652580).

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

1242343242140 is a wasteful number, since it uses less digits than its factorization.

1242343242140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3053 (or 3051 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 1242343242140 its reverse (412423432421), we get a palindrome (1654766674561).

The spelling of 1242343242140 in words is "one trillion, two hundred forty-two billion, three hundred forty-three million, two hundred forty-two thousand, one hundred forty".