1272203712 has 112 divisors (see below), whose sum is σ = 4027810080. Its totient is φ = 391440384.

The previous prime is 1272203711. The next prime is 1272203741. The reversal of 1272203712 is 2173022721.

1272203712 is a `hidden beast` number, since 1 + 272 + 20 + 371 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272203711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5853 + ... + 50780.

It is an arithmetic number, because the mean of its divisors is an integer number (35962590).

Almost surely, 2^1272203712 is an apocalyptic number.

1272203712 is a gapful number since it is divisible by the number (12) 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 1272203712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2013905040).

1272203712 is an abundant number, since it is smaller than the sum of its proper divisors (2755606368).

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

1272203712 is a wasteful number, since it uses less digits than its factorization.

1272203712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56667 (or 56651 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 1272203712 is about 35667.9647863457. The cubic root of 1272203712 is about 1083.5581411065.

The spelling of 1272203712 in words is "one billion, two hundred seventy-two million, two hundred three thousand, seven hundred twelve".