12821205 has 8 divisors (see below), whose sum is σ = 20513952. Its totient is φ = 6837968.

The previous prime is 12821153. The next prime is 12821227. The reversal of 12821205 is 50212821.

It is a happy number.

12821205 is digitally balanced in base 2 and base 4, because in such bases 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 a cyclic number.

It is not a de Polignac number, because 12821205 - 2⁶ = 12821141 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427359 + ... + 427388.

It is an arithmetic number, because the mean of its divisors is an integer number (2564244).

Almost surely, 2^12821205 is an apocalyptic number.

12821205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12821205 is a deficient number, since it is larger than the sum of its proper divisors (7692747).

12821205 is an equidigital number, since it uses as much as digits as its factorization.

12821205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854755.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 12821205 is about 3580.6710264977. The cubic root of 12821205 is about 234.0505223659.

The spelling of 12821205 in words is "twelve million, eight hundred twenty-one thousand, two hundred five".