1243530985200 has 480 divisors, whose sum is σ = 4714133990400. Its totient is φ = 274163957760.

The previous prime is 1243530985153. The next prime is 1243530985267. The reversal of 1243530985200 is 25890353421.

It is a super-2 number, since 2×1243530985200² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

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 95 ways as a sum of consecutive naturals, for example, 343230589 + ... + 343234211.

It is an arithmetic number, because the mean of its divisors is an integer number (9821112480).

Almost surely, 2^{1243530985200} is an apocalyptic number.

1243530985200 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 1243530985200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2357066995200).

1243530985200 is an abundant number, since it is smaller than the sum of its proper divisors (3470603005200).

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

1243530985200 is a wasteful number, since it uses less digits than its factorization.

1243530985200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5089 (or 5078 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 1243530985200 in words is "one trillion, two hundred forty-three billion, five hundred thirty million, nine hundred eighty-five thousand, two hundred".