1281448971320 has 32 divisors (see below), whose sum is σ = 3295154498400. Its totient is φ = 439353932928.

The previous prime is 1281448971317. The next prime is 1281448971337. The reversal of 1281448971320 is 231798441821.

It is a happy number.

It is a super-2 number, since 2×1281448971320² (a number of 25 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 2288301455 + ... + 2288302014.

It is an arithmetic number, because the mean of its divisors is an integer number (102973578075).

Almost surely, 2^{1281448971320} is an apocalyptic number.

1281448971320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1281448971320 is an abundant number, since it is smaller than the sum of its proper divisors (2013705527080).

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

1281448971320 is a wasteful number, since it uses less digits than its factorization.

1281448971320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4576603487 (or 4576603483 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 1281448971320 in words is "one trillion, two hundred eighty-one billion, four hundred forty-eight million, nine hundred seventy-one thousand, three hundred twenty".