12721127 has 8 divisors (see below), whose sum is σ = 13431600. Its totient is φ = 12014784.

The previous prime is 12721103. The next prime is 12721147. The reversal of 12721127 is 72112721.

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

It is not a de Polignac number, because 12721127 - 2¹⁴ = 12704743 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 (12721147) 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, 6953 + ... + 8589.

It is an arithmetic number, because the mean of its divisors is an integer number (1678950).

Almost surely, 2^12721127 is an apocalyptic number.

12721127 is a deficient number, since it is larger than the sum of its proper divisors (710473).

12721127 is a wasteful number, since it uses less digits than its factorization.

12721127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065.

The product of its digits is 392, while the sum is 23.

The square root of 12721127 is about 3566.6688940803. The cubic root of 12721127 is about 233.4399578452.

Adding to 12721127 its reverse (72112721), we get a palindrome (84833848).

The spelling of 12721127 in words is "twelve million, seven hundred twenty-one thousand, one hundred twenty-seven".