1272760720 has 160 divisors (see below), whose sum is σ = 3725761536. Its totient is φ = 392793600.

The previous prime is 1272760717. The next prime is 1272760721. The reversal of 1272760720 is 270672721.

It is not an unprimeable number, because it can be changed into a prime (1272760721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 658155 + ... + 660085.

Almost surely, 2^1272760720 is an apocalyptic number.

1272760720 is a gapful number since it is divisible by the number (10) 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 1272760720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862880768).

1272760720 is an abundant number, since it is smaller than the sum of its proper divisors (2453000816).

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

1272760720 is a wasteful number, since it uses less digits than its factorization.

1272760720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069 (or 2063 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 1272760720 is about 35675.7721710407. The cubic root of 1272760720 is about 1083.7162558499.

The spelling of 1272760720 in words is "one billion, two hundred seventy-two million, seven hundred sixty thousand, seven hundred twenty".