13449221 has 2 divisors, whose sum is σ = 13449222. Its totient is φ = 13449220.

The previous prime is 13449211. The next prime is 13449253. The reversal of 13449221 is 12294431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7756225 + 5692996 = 2785^2 + 2386^2 .

It is a cyclic number.

It is not a de Polignac number, because 13449221 - 2⁶ = 13449157 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 (13449211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6724610 + 6724611.

It is an arithmetic number, because the mean of its divisors is an integer number (6724611).

Almost surely, 2^13449221 is an apocalyptic number.

It is an amenable number.

13449221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13449221 is an equidigital number, since it uses as much as digits as its factorization.

13449221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 13449221 is about 3667.3179573089. The cubic root of 13449221 is about 237.8112395932.

The spelling of 13449221 in words is "thirteen million, four hundred forty-nine thousand, two hundred twenty-one".