1247017040000 has 160 divisors (see below), whose sum is σ = 3114351635340. Its totient is φ = 497203200000.

The previous prime is 1247017039987. The next prime is 1247017040011. The reversal of 1247017040000 is 407107421.

It can be written as a sum of positive squares in 10 ways, for example, as 521780854336 + 725236185664 = 722344^2 + 851608^2 .

It is a tau number, because it is divible by the number of its divisors (160).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25015100 + ... + 25064900.

Almost surely, 2^{1247017040000} is an apocalyptic number.

1247017040000 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 1247017040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1557175817670).

1247017040000 is an abundant number, since it is smaller than the sum of its proper divisors (1867334595340).

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

1247017040000 is an frugal number, since it uses more digits than its factorization.

1247017040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50148 (or 50121 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The spelling of 1247017040000 in words is "one trillion, two hundred forty-seven billion, seventeen million, forty thousand".