127219971 has 4 divisors (see below), whose sum is σ = 169626632. Its totient is φ = 84813312.

The previous prime is 127219951. The next prime is 127219987. The reversal of 127219971 is 179912721.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 127219971 - 2¹⁸ = 126957827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127219901) 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, 21203326 + ... + 21203331.

It is an arithmetic number, because the mean of its divisors is an integer number (42406658).

Almost surely, 2^127219971 is an apocalyptic number.

127219971 is a deficient number, since it is larger than the sum of its proper divisors (42406661).

127219971 is an equidigital number, since it uses as much as digits as its factorization.

127219971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42406660.

The product of its digits is 15876, while the sum is 39.

The square root of 127219971 is about 11279.1830821208. The cubic root of 127219971 is about 502.9426094593.

The spelling of 127219971 in words is "one hundred twenty-seven million, two hundred nineteen thousand, nine hundred seventy-one".