12846221 has 2 divisors, whose sum is σ = 12846222. Its totient is φ = 12846220.

The previous prime is 12846209. The next prime is 12846227. The reversal of 12846221 is 12264821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9853321 + 2992900 = 3139^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 12846221 - 2²² = 8651917 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12846227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6423110 + 6423111.

It is an arithmetic number, because the mean of its divisors is an integer number (6423111).

Almost surely, 2^12846221 is an apocalyptic number.

It is an amenable number.

12846221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12846221 is an equidigital number, since it uses as much as digits as its factorization.

12846221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 26.

The square root of 12846221 is about 3584.1625242168. The cubic root of 12846221 is about 234.2026454569.

The spelling of 12846221 in words is "twelve million, eight hundred forty-six thousand, two hundred twenty-one".