1272291712 has 96 divisors (see below), whose sum is σ = 2686582080. Its totient is φ = 599918592.

The previous prime is 1272291707. The next prime is 1272291719. The reversal of 1272291712 is 2171922721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272291719) 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 11 ways as a sum of consecutive naturals, for example, 5705233 + ... + 5705455.

It is an arithmetic number, because the mean of its divisors is an integer number (27985230).

Almost surely, 2^1272291712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272291712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343291040).

1272291712 is an abundant number, since it is smaller than the sum of its proper divisors (1414290368).

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

1272291712 is an equidigital number, since it uses as much as digits as its factorization.

1272291712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 307 counting only the distinct ones).

The product of its digits is 7056, while the sum is 34.

The square root of 1272291712 is about 35669.1983649759. The cubic root of 1272291712 is about 1083.5831242433.

The spelling of 1272291712 in words is "one billion, two hundred seventy-two million, two hundred ninety-one thousand, seven hundred twelve".