1436221 has 2 divisors, whose sum is σ = 1436222. Its totient is φ = 1436220.

The previous prime is 1436207. The next prime is 1436231. The reversal of 1436221 is 1226341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1413721 + 22500 = 1189^2 + 150^2 .

It is an emirp because it is prime and its reverse (1226341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1436221 - 2⁷ = 1436093 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 1 + 4¹⁰ + 3¹¹ + 6⁶ + 2¹⁵ + 2¹⁷ + 1 .

1436221 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1436231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718110 + 718111.

It is an arithmetic number, because the mean of its divisors is an integer number (718111).

2^1436221 is an apocalyptic number.

It is an amenable number.

1436221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1436221 is an equidigital number, since it uses as much as digits as its factorization.

1436221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 1436221 is about 1198.4243822620. The cubic root of 1436221 is about 112.8254542844.

The spelling of 1436221 in words is "one million, four hundred thirty-six thousand, two hundred twenty-one".