127730172 has 12 divisors (see below), whose sum is σ = 298037096. Its totient is φ = 42576720.

The previous prime is 127730171. The next prime is 127730177. The reversal of 127730172 is 271037721.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127730171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5322079 + ... + 5322102.

Almost surely, 2^127730172 is an apocalyptic number.

127730172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

127730172 is an abundant number, since it is smaller than the sum of its proper divisors (170306924).

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

127730172 is a wasteful number, since it uses less digits than its factorization.

127730172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10644188 (or 10644186 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 30.

The square root of 127730172 is about 11301.7773823412. Note that the first 3 decimals coincide. The cubic root of 127730172 is about 503.6140437697.

Adding to 127730172 its reverse (271037721), we get a palindrome (398767893).

The spelling of 127730172 in words is "one hundred twenty-seven million, seven hundred thirty thousand, one hundred seventy-two".