1320986 has 4 divisors (see below), whose sum is σ = 1981482. Its totient is φ = 660492.

The previous prime is 1320983. The next prime is 1321007. The reversal of 1320986 is 6890231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1288225 + 32761 = 1135^2 + 181^2 .

It is not an unprimeable number, because it can be changed into a prime (1320983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330245 + ... + 330248.

2^1320986 is an apocalyptic number.

1320986 is a deficient number, since it is larger than the sum of its proper divisors (660496).

1320986 is an equidigital number, since it uses as much as digits as its factorization.

1320986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660495.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1320986 is about 1149.3415506280. The cubic root of 1320986 is about 109.7234374793.

The spelling of 1320986 in words is "one million, three hundred twenty thousand, nine hundred eighty-six".