127472421 has 4 divisors (see below), whose sum is σ = 169963232. Its totient is φ = 84981612.

The previous prime is 127472419. The next prime is 127472441. The reversal of 127472421 is 124274721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 127472421 - 2¹ = 127472419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127472441) 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 3 ways as a sum of consecutive naturals, for example, 21245401 + ... + 21245406.

It is an arithmetic number, because the mean of its divisors is an integer number (42490808).

Almost surely, 2^127472421 is an apocalyptic number.

It is an amenable number.

127472421 is a deficient number, since it is larger than the sum of its proper divisors (42490811).

127472421 is an equidigital number, since it uses as much as digits as its factorization.

127472421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42490810.

The product of its digits is 6272, while the sum is 30.

The square root of 127472421 is about 11290.3685059435. The cubic root of 127472421 is about 503.2750624276.

The spelling of 127472421 in words is "one hundred twenty-seven million, four hundred seventy-two thousand, four hundred twenty-one".