1330720 has 24 divisors (see below), whose sum is σ = 3144204. Its totient is φ = 532224.

The previous prime is 1330699. The next prime is 1330727. The reversal of 1330720 is 270331.

It can be written as a sum of positive squares in 2 ways, for example, as 1245456 + 85264 = 1116^2 + 292^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1330694 and 1330703.

It is not an unprimeable number, because it can be changed into a prime (1330727) 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 in 3 ways as a sum of consecutive naturals, for example, 3999 + ... + 4318.

2^1330720 is an apocalyptic number.

1330720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1330720 is an abundant number, since it is smaller than the sum of its proper divisors (1813484).

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

1330720 is an equidigital number, since it uses as much as digits as its factorization.

1330720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8332 (or 8324 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 1330720 is about 1153.5683768204. The cubic root of 1330720 is about 109.9922859604.

The spelling of 1330720 in words is "one million, three hundred thirty thousand, seven hundred twenty".