12821375 has 16 divisors (see below), whose sum is σ = 18288192. Its totient is φ = 8791200.

The previous prime is 12821359. The next prime is 12821377. The reversal of 12821375 is 57312821.

12821375 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12821375 - 2⁴ = 12821359 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 (12821377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6452 + ... + 8201.

It is an arithmetic number, because the mean of its divisors is an integer number (1143012).

Almost surely, 2^12821375 is an apocalyptic number.

12821375 is a deficient number, since it is larger than the sum of its proper divisors (5466817).

12821375 is an equidigital number, since it uses as much as digits as its factorization.

12821375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14675 (or 14665 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 12821375 is about 3580.6947649863. The cubic root of 12821375 is about 234.0515568088.

The spelling of 12821375 in words is "twelve million, eight hundred twenty-one thousand, three hundred seventy-five".