1320313 has 4 divisors (see below), whose sum is σ = 1327348. Its totient is φ = 1313280.

The previous prime is 1320307. The next prime is 1320331. The reversal of 1320313 is 3130231.

1320313 = 812² + 813².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 660969 + 659344 = 813^2 + 812^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320293 and 1320302.

It is not an unprimeable number, because it can be changed into a prime (1320343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3228 + ... + 3613.

It is an arithmetic number, because the mean of its divisors is an integer number (331837).

2^1320313 is an apocalyptic number.

1320313 is the 813-rd centered square number.

It is an amenable number.

1320313 is a deficient number, since it is larger than the sum of its proper divisors (7035).

1320313 is an equidigital number, since it uses as much as digits as its factorization.

1320313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 1320313 is about 1149.0487369994. The cubic root of 1320313 is about 109.7048007899.

Adding to 1320313 its reverse (3130231), we get a palindrome (4450544).

The spelling of 1320313 in words is "one million, three hundred twenty thousand, three hundred thirteen".