1303321 has 2 divisors, whose sum is σ = 1303322. Its totient is φ = 1303320.

The previous prime is 1303307. The next prime is 1303327. The reversal of 1303321 is 1233031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1299600 + 3721 = 1140^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303321 - 2¹¹ = 1301273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1303327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651660 + 651661.

It is an arithmetic number, because the mean of its divisors is an integer number (651661).

2^1303321 is an apocalyptic number.

It is an amenable number.

1303321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303321 is an equidigital number, since it uses as much as digits as its factorization.

1303321 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1303321 is about 1141.6308510197. The cubic root of 1303321 is about 109.2321455811.

Adding to 1303321 its reverse (1233031), we get a palindrome (2536352).

The spelling of 1303321 in words is "one million, three hundred three thousand, three hundred twenty-one".