1326649 has 2 divisors, whose sum is σ = 1326650. Its totient is φ = 1326648.

The previous prime is 1326641. The next prime is 1326653. The reversal of 1326649 is 9466231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846400 + 480249 = 920^2 + 693^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326649 - 2³ = 1326641 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1326649.

It is not a weakly prime, because it can be changed into another prime (1326641) 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, 663324 + 663325.

It is an arithmetic number, because the mean of its divisors is an integer number (663325).

2^1326649 is an apocalyptic number.

It is an amenable number.

1326649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326649 is an equidigital number, since it uses as much as digits as its factorization.

1326649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 1326649 is about 1151.8025004314. The cubic root of 1326649 is about 109.8800068946.

It can be divided in two parts, 13 and 26649, that added together give a palindrome (26662).

The spelling of 1326649 in words is "one million, three hundred twenty-six thousand, six hundred forty-nine".