1272658112 has 56 divisors (see below), whose sum is σ = 2781921792. Its totient is φ = 572832000.

The previous prime is 1272658091. The next prime is 1272658117. The reversal of 1272658112 is 2118562721.

It is not an unprimeable number, because it can be changed into a prime (1272658117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63737 + ... + 81287.

Almost surely, 2^1272658112 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 1272658112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1390960896).

1272658112 is an abundant number, since it is smaller than the sum of its proper divisors (1509263680).

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

1272658112 is a wasteful number, since it uses less digits than its factorization.

1272658112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17677 (or 17667 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 1272658112 is about 35674.3340792789. The cubic root of 1272658112 is about 1083.6871325580.

The spelling of 1272658112 in words is "one billion, two hundred seventy-two million, six hundred fifty-eight thousand, one hundred twelve".