1320513 has 4 divisors (see below), whose sum is σ = 1760688. Its totient is φ = 880340.

The previous prime is 1320437. The next prime is 1320533. The reversal of 1320513 is 3150231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1320513 - 2¹² = 1316417 is a prime.

It is a D-number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1320492 and 1320501.

It is not an unprimeable number, because it can be changed into a prime (1320533) 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, 220083 + ... + 220088.

It is an arithmetic number, because the mean of its divisors is an integer number (440172).

2^1320513 is an apocalyptic number.

It is an amenable number.

1320513 is a deficient number, since it is larger than the sum of its proper divisors (440175).

1320513 is an equidigital number, since it uses as much as digits as its factorization.

1320513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440174.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1320513 is about 1149.1357622144. The cubic root of 1320513 is about 109.7103398433.

Adding to 1320513 its reverse (3150231), we get a palindrome (4470744).

The spelling of 1320513 in words is "one million, three hundred twenty thousand, five hundred thirteen".