1272396855240 has 1152 divisors, whose sum is σ = 5068115619840. Its totient is φ = 275788800000.

The previous prime is 1272396855209. The next prime is 1272396855251. The reversal of 1272396855240 is 425586932721.

1272396855240 is a `hidden beast` number, since 1 + 2 + 7 + 2 + 39 + 6 + 85 + 524 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 6661763545 + ... + 6661763735.

It is an arithmetic number, because the mean of its divisors is an integer number (4399405920).

It is a 1-persistent number, because it is pandigital, but 2⋅1272396855240 = 2544793710480 is not.

Almost surely, 2^{1272396855240} is an apocalyptic number.

1272396855240 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 1272396855240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2534057809920).

1272396855240 is an abundant number, since it is smaller than the sum of its proper divisors (3795718764600).

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

1272396855240 is a wasteful number, since it uses less digits than its factorization.

1272396855240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 1272396855240 in words is "one trillion, two hundred seventy-two billion, three hundred ninety-six million, eight hundred fifty-five thousand, two hundred forty".