12465221 has 2 divisors, whose sum is σ = 12465222. Its totient is φ = 12465220.

The previous prime is 12465217. The next prime is 12465239. The reversal of 12465221 is 12256421.

It is a happy number.

12465221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8008900 + 4456321 = 2830^2 + 2111^2 .

It is an emirp because it is prime and its reverse (12256421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12465221 - 2² = 12465217 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12465421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6232610 + 6232611.

It is an arithmetic number, because the mean of its divisors is an integer number (6232611).

Almost surely, 2^12465221 is an apocalyptic number.

It is an amenable number.

12465221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12465221 is an equidigital number, since it uses as much as digits as its factorization.

12465221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 12465221 is about 3530.6119866108. The cubic root of 12465221 is about 231.8640019922.

The spelling of 12465221 in words is "twelve million, four hundred sixty-five thousand, two hundred twenty-one".