1242850520128 has 56 divisors (see below), whose sum is σ = 2941155603072. Its totient is φ = 509491513344.

The previous prime is 1242850520117. The next prime is 1242850520137. The reversal of 1242850520128 is 8210250582421.

It is a tau number, because it is divible by the number of its divisors (56).

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 7 ways as a sum of consecutive naturals, for example, 60298825 + ... + 60319432.

Almost surely, 2^{1242850520128} is an apocalyptic number.

It is an amenable number.

1242850520128 is an abundant number, since it is smaller than the sum of its proper divisors (1698305082944).

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

1242850520128 is a wasteful number, since it uses less digits than its factorization.

1242850520128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120618299 (or 120618289 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 40.

The spelling of 1242850520128 in words is "one trillion, two hundred forty-two billion, eight hundred fifty million, five hundred twenty thousand, one hundred twenty-eight".