1320646 has 8 divisors (see below), whose sum is σ = 1994544. Its totient is φ = 655800.

The previous prime is 1320623. The next prime is 1320667. The reversal of 1320646 is 6460231.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1885 + ... + 2488.

It is an arithmetic number, because the mean of its divisors is an integer number (249318).

2^1320646 is an apocalyptic number.

1320646 is a deficient number, since it is larger than the sum of its proper divisors (673898).

1320646 is a wasteful number, since it uses less digits than its factorization.

1320646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4526.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1320646 is about 1149.1936303339. The cubic root of 1320646 is about 109.7140230041.

Adding to 1320646 its reverse (6460231), we get a palindrome (7780877).

The spelling of 1320646 in words is "one million, three hundred twenty thousand, six hundred forty-six".