127868721 has 8 divisors (see below), whose sum is σ = 172546080. Its totient is φ = 84218592.

The previous prime is 127868711. The next prime is 127868723.

127868721 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 127868721 - 2⁷ = 127868593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127868723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256516 + ... + 257013.

It is an arithmetic number, because the mean of its divisors is an integer number (21568260).

Almost surely, 2^127868721 is an apocalyptic number.

It is an amenable number.

127868721 is a deficient number, since it is larger than the sum of its proper divisors (44677359).

127868721 is an equidigital number, since it uses as much as digits as its factorization.

127868721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513615.

The product of its digits is 75264, while the sum is 42.

The square root of 127868721 is about 11307.9052436780. The cubic root of 127868721 is about 503.7960681310.

The spelling of 127868721 in words is "one hundred twenty-seven million, eight hundred sixty-eight thousand, seven hundred twenty-one".