12863221 has 8 divisors (see below), whose sum is σ = 14722560. Its totient is φ = 11009328.

The previous prime is 12863177. The next prime is 12863251. The reversal of 12863221 is 12236821.

12863221 is digitally balanced in base 2 and base 3, 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 12863221 - 2¹⁹ = 12338933 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 (12863251) 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, 8220 + ... + 9658.

It is an arithmetic number, because the mean of its divisors is an integer number (1840320).

Almost surely, 2^12863221 is an apocalyptic number.

It is an amenable number.

12863221 is a deficient number, since it is larger than the sum of its proper divisors (1859339).

12863221 is a wasteful number, since it uses less digits than its factorization.

12863221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723.

The product of its digits is 1152, while the sum is 25.

The square root of 12863221 is about 3586.5332843848. The cubic root of 12863221 is about 234.3059103259.

The spelling of 12863221 in words is "twelve million, eight hundred sixty-three thousand, two hundred twenty-one".