1320686 has 8 divisors (see below), whose sum is σ = 1990440. Its totient is φ = 657208.

The previous prime is 1320667. The next prime is 1320721. The reversal of 1320686 is 6860231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1001 + ... + 1908.

It is an arithmetic number, because the mean of its divisors is an integer number (248805).

2^1320686 is an apocalyptic number.

1320686 is a deficient number, since it is larger than the sum of its proper divisors (669754).

1320686 is a wasteful number, since it uses less digits than its factorization.

1320686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3138.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1320686 is about 1149.2110337096. The cubic root of 1320686 is about 109.7151306733.

The spelling of 1320686 in words is "one million, three hundred twenty thousand, six hundred eighty-six".