1320859 has 2 divisors, whose sum is σ = 1320860. Its totient is φ = 1320858.

The previous prime is 1320811. The next prime is 1320871. The reversal of 1320859 is 9580231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320859 - 2⁷ = 1320731 is a prime.

1320859 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1320889) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660429 + 660430.

It is an arithmetic number, because the mean of its divisors is an integer number (660430).

2^1320859 is an apocalyptic number.

1320859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320859 is an equidigital number, since it uses as much as digits as its factorization.

1320859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1320859 is about 1149.2863002751. The cubic root of 1320859 is about 109.7199210850.

The spelling of 1320859 in words is "one million, three hundred twenty thousand, eight hundred fifty-nine".