1326389 has 2 divisors, whose sum is σ = 1326390. Its totient is φ = 1326388.

The previous prime is 1326383. The next prime is 1326419. The reversal of 1326389 is 9836231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1119364 + 207025 = 1058^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326389 - 2⁸ = 1326133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1326383) 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, 663194 + 663195.

It is an arithmetic number, because the mean of its divisors is an integer number (663195).

2^1326389 is an apocalyptic number.

It is an amenable number.

1326389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326389 is an equidigital number, since it uses as much as digits as its factorization.

1326389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 1326389 is about 1151.6896283287. The cubic root of 1326389 is about 109.8728282391.

It can be divided in two parts, 132 and 6389, that multiplied together give a palindrome (843348).

The spelling of 1326389 in words is "one million, three hundred twenty-six thousand, three hundred eighty-nine".