1243604947200 has 864 divisors, whose sum is σ = 5221599129600. Its totient is φ = 258396364800.

The previous prime is 1243604947171. The next prime is 1243604947243. The reversal of 1243604947200 is 27494063421.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 72433017 + ... + 72450183.

Almost surely, 2^{1243604947200} is an apocalyptic number.

1243604947200 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 1243604947200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2610799564800).

1243604947200 is an abundant number, since it is smaller than the sum of its proper divisors (3977994182400).

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

1243604947200 is a wasteful number, since it uses less digits than its factorization.

1243604947200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17228 (or 17195 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 1243604947200 in words is "one trillion, two hundred forty-three billion, six hundred four million, nine hundred forty-seven thousand, two hundred".