1320379 has 2 divisors, whose sum is σ = 1320380. Its totient is φ = 1320378.

The previous prime is 1320377. The next prime is 1320391. The reversal of 1320379 is 9730231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320379 - 2¹ = 1320377 is a prime.

Together with 1320377, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1320377) 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, 660189 + 660190.

It is an arithmetic number, because the mean of its divisors is an integer number (660190).

2^1320379 is an apocalyptic number.

1320379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320379 is an equidigital number, since it uses as much as digits as its factorization.

1320379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 1320379 is about 1149.0774560490. The cubic root of 1320379 is about 109.7066287394.

The spelling of 1320379 in words is "one million, three hundred twenty thousand, three hundred seventy-nine".