127721472 has 56 divisors (see below), whose sum is σ = 340635336. Its totient is φ = 42565632.

The previous prime is 127721453. The next prime is 127721557. The reversal of 127721472 is 274127721.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21978 + ... + 27174.

Almost surely, 2^127721472 is an apocalyptic number.

127721472 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 127721472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170317668).

127721472 is an abundant number, since it is smaller than the sum of its proper divisors (212913864).

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

127721472 is an frugal number, since it uses more digits than its factorization.

127721472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226 (or 5202 counting only the distinct ones).

The product of its digits is 10976, while the sum is 33.

The square root of 127721472 is about 11301.3924805751. The cubic root of 127721472 is about 503.6026094010.

The spelling of 127721472 in words is "one hundred twenty-seven million, seven hundred twenty-one thousand, four hundred seventy-two".