1214221 has 2 divisors, whose sum is σ = 1214222. Its totient is φ = 1214220.

The previous prime is 1214219. The next prime is 1214237. The reversal of 1214221 is 1224121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 837225 + 376996 = 915^2 + 614^2 .

It is an emirp because it is prime and its reverse (1224121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1214221 - 2¹ = 1214219 is a prime.

Together with 1214219, it forms a pair of twin primes.

It is an Ulam number.

1214221 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607110 + 607111.

It is an arithmetic number, because the mean of its divisors is an integer number (607111).

2^1214221 is an apocalyptic number.

It is an amenable number.

1214221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214221 is an equidigital number, since it uses as much as digits as its factorization.

1214221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 13.

The square root of 1214221 is about 1101.9169660188. The cubic root of 1214221 is about 106.6839891572.

Adding to 1214221 its reverse (1224121), we get a palindrome (2438342).

The spelling of 1214221 in words is "one million, two hundred fourteen thousand, two hundred twenty-one".