1273121835040 has 48 divisors (see below), whose sum is σ = 3281182188480. Its totient is φ = 462953393920.

The previous prime is 1273121835017. The next prime is 1273121835067. The reversal of 1273121835040 is 405381213721.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361680580 + ... + 361684099.

It is an arithmetic number, because the mean of its divisors is an integer number (68357962260).

Almost surely, 2^{1273121835040} is an apocalyptic number.

1273121835040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1273121835040 is an abundant number, since it is smaller than the sum of its proper divisors (2008060353440).

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

1273121835040 is a wasteful number, since it uses less digits than its factorization.

1273121835040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723364705 (or 723364697 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 1273121835040 in words is "one trillion, two hundred seventy-three billion, one hundred twenty-one million, eight hundred thirty-five thousand, forty".