12721327 has 4 divisors (see below), whose sum is σ = 12874680. Its totient is φ = 12567976.

The previous prime is 12721273. The next prime is 12721333. The reversal of 12721327 is 72312721.

12721327 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72312721 = 13 ⋅5562517.

It is a cyclic number.

It is not a de Polignac number, because 12721327 - 2¹⁹ = 12197039 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 (12727327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76552 + ... + 76717.

It is an arithmetic number, because the mean of its divisors is an integer number (3218670).

Almost surely, 2^12721327 is an apocalyptic number.

12721327 is a deficient number, since it is larger than the sum of its proper divisors (153353).

12721327 is an equidigital number, since it uses as much as digits as its factorization.

12721327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153352.

The product of its digits is 1176, while the sum is 25.

The square root of 12721327 is about 3566.6969313358. The cubic root of 12721327 is about 233.4411812102.

The spelling of 12721327 in words is "twelve million, seven hundred twenty-one thousand, three hundred twenty-seven".