1320533 has 2 divisors, whose sum is σ = 1320534. Its totient is φ = 1320532.

The previous prime is 1320437. The next prime is 1320541. The reversal of 1320533 is 3350231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677329 + 643204 = 823^2 + 802^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320533 - 2¹⁰ = 1319509 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660266 + 660267.

It is an arithmetic number, because the mean of its divisors is an integer number (660267).

2^1320533 is an apocalyptic number.

It is an amenable number.

1320533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320533 is an equidigital number, since it uses as much as digits as its factorization.

1320533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 1320533 is about 1149.1444643734. The cubic root of 1320533 is about 109.7108937179.

Adding to 1320533 its reverse (3350231), we get a palindrome (4670764).

The spelling of 1320533 in words is "one million, three hundred twenty thousand, five hundred thirty-three".