1320680 has 32 divisors (see below), whose sum is σ = 3005640. Its totient is φ = 522240.

The previous prime is 1320667. The next prime is 1320721. The reversal of 1320680 is 860231.

It can be written as a sum of positive squares in 4 ways, for example, as 1214404 + 106276 = 1102^2 + 326^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5360 + ... + 5600.

2^1320680 is an apocalyptic number.

1320680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320680 is an abundant number, since it is smaller than the sum of its proper divisors (1684960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320680 is a wasteful number, since it uses less digits than its factorization.

1320680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1320680 is about 1149.2084232201. The cubic root of 1320680 is about 109.7149645244.

The spelling of 1320680 in words is "one million, three hundred twenty thousand, six hundred eighty".