1242971784040 has 64 divisors (see below), whose sum is σ = 3335178965760. Its totient is φ = 407632980480.

The previous prime is 1242971783953. The next prime is 1242971784053. The reversal of 1242971784040 is 404871792421.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96497581 + ... + 96510460.

It is an arithmetic number, because the mean of its divisors is an integer number (52112171340).

Almost surely, 2^{1242971784040} is an apocalyptic number.

1242971784040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242971784040 is an abundant number, since it is smaller than the sum of its proper divisors (2092207181720).

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

1242971784040 is a wasteful number, since it uses less digits than its factorization.

1242971784040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193008082 (or 193008078 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 1242971784040 in words is "one trillion, two hundred forty-two billion, nine hundred seventy-one million, seven hundred eighty-four thousand, forty".