1272009403250 has 32 divisors (see below), whose sum is σ = 2381715975600. Its totient is φ = 508693852800.

The previous prime is 1272009403243. The next prime is 1272009403253. The reversal of 1272009403250 is 523049002721.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 577422173689 + 694587229561 = 759883^2 + 833419^2 .

It is a super-2 number, since 2×1272009403250² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1272009403250.

It is not an unprimeable number, because it can be changed into a prime (1272009403253) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 615032 + ... + 1709468.

Almost surely, 2^{1272009403250} is an apocalyptic number.

1272009403250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272009403250 is a deficient number, since it is larger than the sum of its proper divisors (1109706572350).

1272009403250 is a wasteful number, since it uses less digits than its factorization.

1272009403250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099103 (or 1099093 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 1272009403250 in words is "one trillion, two hundred seventy-two billion, nine million, four hundred three thousand, two hundred fifty".