1273450945200 has 720 divisors, whose sum is σ = 5001173404416. Its totient is φ = 275632896000.

The previous prime is 1273450945199. The next prime is 1273450945229. The reversal of 1273450945200 is 25490543721.

It is a happy number.

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 143 ways as a sum of consecutive naturals, for example, 136587739 + ... + 136597061.

Almost surely, 2^{1273450945200} is an apocalyptic number.

1273450945200 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 1273450945200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2500586702208).

1273450945200 is an abundant number, since it is smaller than the sum of its proper divisors (3727722459216).

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

1273450945200 is a wasteful number, since it uses less digits than its factorization.

1273450945200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9482 (or 9464 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 1273450945200 in words is "one trillion, two hundred seventy-three billion, four hundred fifty million, nine hundred forty-five thousand, two hundred".