1320730 has 24 divisors (see below), whose sum is σ = 2530908. Its totient is φ = 496128.

The previous prime is 1320727. The next prime is 1320731. The reversal of 1320730 is 370231.

It can be written as a sum of positive squares in 6 ways, for example, as 1159929 + 160801 = 1077^2 + 401^2 .

It is not an unprimeable number, because it can be changed into a prime (1320731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2662 + ... + 3118.

2^1320730 is an apocalyptic number.

1320730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320730 is a deficient number, since it is larger than the sum of its proper divisors (1210178).

1320730 is a wasteful number, since it uses less digits than its factorization.

1320730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498 (or 481 counting only the distinct ones).

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

The square root of 1320730 is about 1149.2301771186. The cubic root of 1320730 is about 109.7163490836.

Adding to 1320730 its reverse (370231), we get a palindrome (1690961).

The spelling of 1320730 in words is "one million, three hundred twenty thousand, seven hundred thirty".