1320246533 has 4 divisors (see below), whose sum is σ = 1333857420. Its totient is φ = 1306635648.

The previous prime is 1320246511. The next prime is 1320246563. The reversal of 1320246533 is 3356420231.

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 181656484 + 1138590049 = 13478^2 + 33743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320246533 - 2²⁸ = 1051811077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320246496 and 1320246505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320246563) 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, 6805298 + ... + 6805491.

It is an arithmetic number, because the mean of its divisors is an integer number (333464355).

Almost surely, 2^1320246533 is an apocalyptic number.

It is an amenable number.

1320246533 is a deficient number, since it is larger than the sum of its proper divisors (13610887).

1320246533 is an equidigital number, since it uses as much as digits as its factorization.

1320246533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13610886.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 1320246533 is about 36335.1968895175. The cubic root of 1320246533 is about 1097.0295984482.

Adding to 1320246533 its reverse (3356420231), we get a palindrome (4676666764).

The spelling of 1320246533 in words is "one billion, three hundred twenty million, two hundred forty-six thousand, five hundred thirty-three".