1247047027200 has 720 divisors, whose sum is σ = 4849322357880. Its totient is φ = 304207626240.

The previous prime is 1247047027189. The next prime is 1247047027249. The reversal of 1247047027200 is 27207407421.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 412252416 + 1246634774784 = 20304^2 + 1116528^2 .

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 169225116 + ... + 169232484.

Almost surely, 2^{1247047027200} is an apocalyptic number.

1247047027200 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 1247047027200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2424661178940).

1247047027200 is an abundant number, since it is smaller than the sum of its proper divisors (3602275330680).

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

1247047027200 is a wasteful number, since it uses less digits than its factorization.

1247047027200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7529 (or 7505 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 36.

The spelling of 1247047027200 in words is "one trillion, two hundred forty-seven billion, forty-seven million, twenty-seven thousand, two hundred".