1242904045992 has 128 divisors (see below), whose sum is σ = 3628633559040. Its totient is φ = 347375543040.

The previous prime is 1242904045973. The next prime is 1242904045997. The reversal of 1242904045992 is 2995404092421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1242904045997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15206418 + ... + 15287934.

It is an arithmetic number, because the mean of its divisors is an integer number (28348699680).

Almost surely, 2^{1242904045992} is an apocalyptic number.

1242904045992 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 1242904045992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814316779520).

1242904045992 is an abundant number, since it is smaller than the sum of its proper divisors (2385729513048).

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

1242904045992 is a wasteful number, since it uses less digits than its factorization.

1242904045992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83511 (or 83507 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 1242904045992 in words is "one trillion, two hundred forty-two billion, nine hundred four million, forty-five thousand, nine hundred ninety-two".