127282721 has 8 divisors (see below), whose sum is σ = 131335680. Its totient is φ = 123285888.

The previous prime is 127282703. The next prime is 127282751.

127282721 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 127282721 - 2⁶ = 127282657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127282751) 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 7 ways as a sum of consecutive naturals, for example, 9401 + ... + 18518.

It is an arithmetic number, because the mean of its divisors is an integer number (16416960).

Almost surely, 2^127282721 is an apocalyptic number.

It is an amenable number.

127282721 is a deficient number, since it is larger than the sum of its proper divisors (4052959).

127282721 is an equidigital number, since it uses as much as digits as its factorization.

127282721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28063.

The product of its digits is 6272, while the sum is 32.

The square root of 127282721 is about 11281.9644122821. The cubic root of 127282721 is about 503.0252863668.

The spelling of 127282721 in words is "one hundred twenty-seven million, two hundred eighty-two thousand, seven hundred twenty-one".