12721371 has 8 divisors (see below), whose sum is σ = 18266640. Its totient is φ = 7828512.

The previous prime is 12721363. The next prime is 12721391. The reversal of 12721371 is 17312721.

12721371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12721371 - 2³ = 12721363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12721361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163056 + ... + 163133.

It is an arithmetic number, because the mean of its divisors is an integer number (2283330).

Almost surely, 2^12721371 is an apocalyptic number.

12721371 is a deficient number, since it is larger than the sum of its proper divisors (5545269).

12721371 is a wasteful number, since it uses less digits than its factorization.

12721371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326205.

The product of its digits is 588, while the sum is 24.

The square root of 12721371 is about 3566.7030995024. The cubic root of 12721371 is about 233.4414503488.

The spelling of 12721371 in words is "twelve million, seven hundred twenty-one thousand, three hundred seventy-one".