1272740727400 has 24 divisors (see below), whose sum is σ = 2959122191670. Its totient is φ = 509096290880.

The previous prime is 1272740727367. The next prime is 1272740727451. The reversal of 1272740727400 is 47270472721.

It can be written as a sum of positive squares in 3 ways, for example, as 923324966404 + 349415760996 = 960898^2 + 591114^2 .

It is a super-2 number, since 2×1272740727400² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3181851619 + ... + 3181852018.

Almost surely, 2^{1272740727400} is an apocalyptic number.

1272740727400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272740727400 is an abundant number, since it is smaller than the sum of its proper divisors (1686381464270).

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

1272740727400 is a wasteful number, since it uses less digits than its factorization.

1272740727400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6363703653 (or 6363703644 counting only the distinct ones).

The product of its (nonzero) digits is 307328, while the sum is 43.

The spelling of 1272740727400 in words is "one trillion, two hundred seventy-two billion, seven hundred forty million, seven hundred twenty-seven thousand, four hundred".