1330820 has 12 divisors (see below), whose sum is σ = 2794764. Its totient is φ = 532320.

The previous prime is 1330789. The next prime is 1330831. The reversal of 1330820 is 280331.

It can be written as a sum of positive squares in 2 ways, for example, as 857476 + 473344 = 926^2 + 688^2 .

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, 33251 + ... + 33290.

It is an arithmetic number, because the mean of its divisors is an integer number (232897).

2^1330820 is an apocalyptic number.

1330820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1330820 is an abundant number, since it is smaller than the sum of its proper divisors (1463944).

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

1330820 is a wasteful number, since it uses less digits than its factorization.

1330820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66550 (or 66548 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1330820 is about 1153.6117197740. The cubic root of 1330820 is about 109.9950410988.

The spelling of 1330820 in words is "one million, three hundred thirty thousand, eight hundred twenty".