1326889 has 2 divisors, whose sum is σ = 1326890. Its totient is φ = 1326888.

The previous prime is 1326887. The next prime is 1326917. The reversal of 1326889 is 9886231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1227664 + 99225 = 1108^2 + 315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326889 - 2¹ = 1326887 is a prime.

Together with 1326887, it forms a pair of twin primes.

1326889 is a lucky number.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (1326881) 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, 663444 + 663445.

It is an arithmetic number, because the mean of its divisors is an integer number (663445).

2^1326889 is an apocalyptic number.

It is an amenable number.

1326889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326889 is an equidigital number, since it uses as much as digits as its factorization.

1326889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 1326889 is about 1151.9066802480. The cubic root of 1326889 is about 109.8866325134.

It can be divided in two parts, 132 and 6889, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 1326889 in words is "one million, three hundred twenty-six thousand, eight hundred eighty-nine".