12821373 has 18 divisors (see below), whose sum is σ = 19367166. Its totient is φ = 8172912.

The previous prime is 12821359. The next prime is 12821377. The reversal of 12821373 is 37312821.

It can be written as a sum of positive squares in only one way, i.e., 10517049 + 2304324 = 3243^2 + 1518^2 .

It is not a de Polignac number, because 12821373 - 2⁴ = 12821357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12821377) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3415 + ... + 6107.

Almost surely, 2^12821373 is an apocalyptic number.

It is an amenable number.

12821373 is a deficient number, since it is larger than the sum of its proper divisors (6545793).

12821373 is a wasteful number, since it uses less digits than its factorization.

12821373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745 (or 2719 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12821373 is about 3580.6944857108. The cubic root of 12821373 is about 234.0515446390.

The spelling of 12821373 in words is "twelve million, eight hundred twenty-one thousand, three hundred seventy-three".