1389211 has 2 divisors, whose sum is σ = 1389212. Its totient is φ = 1389210.

The previous prime is 1389209. The next prime is 1389217. The reversal of 1389211 is 1129831.

It is a weak prime.

It is an emirp because it is prime and its reverse (1129831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1389211 - 2¹ = 1389209 is a prime.

Together with 1389209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1389217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694605 + 694606.

It is an arithmetic number, because the mean of its divisors is an integer number (694606).

2^1389211 is an apocalyptic number.

1389211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389211 is an equidigital number, since it uses as much as digits as its factorization.

1389211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 25.

The square root of 1389211 is about 1178.6479542255. The cubic root of 1389211 is about 111.5807829520.

It can be divided in two parts, 1389 and 211, that added together give a square (1600 = 40²).

The spelling of 1389211 in words is "one million, three hundred eighty-nine thousand, two hundred eleven".