1273525349280 has 864 divisors, whose sum is σ = 4603089218112. Its totient is φ = 294906839040.

The previous prime is 1273525349279. The next prime is 1273525349287. The reversal of 1273525349280 is 829435253721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1273525349287) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4148290887 + ... + 4148291193.

It is an arithmetic number, because the mean of its divisors is an integer number (5327649558).

Almost surely, 2^{1273525349280} is an apocalyptic number.

1273525349280 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 1273525349280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2301544609056).

1273525349280 is an abundant number, since it is smaller than the sum of its proper divisors (3329563868832).

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

1273525349280 is a wasteful number, since it uses less digits than its factorization.

1273525349280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 1273525349280 in words is "one trillion, two hundred seventy-three billion, five hundred twenty-five million, three hundred forty-nine thousand, two hundred eighty".