13445321 has 2 divisors, whose sum is σ = 13445322. Its totient is φ = 13445320.

The previous prime is 13445309. The next prime is 13445347. The reversal of 13445321 is 12354431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11485321 + 1960000 = 3389^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 13445321 - 2¹⁴ = 13428937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13445371) 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, 6722660 + 6722661.

It is an arithmetic number, because the mean of its divisors is an integer number (6722661).

Almost surely, 2^13445321 is an apocalyptic number.

It is an amenable number.

13445321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13445321 is an equidigital number, since it uses as much as digits as its factorization.

13445321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 13445321 is about 3666.7861950215. The cubic root of 13445321 is about 237.7882505666.

Adding to 13445321 its reverse (12354431), we get a palindrome (25799752).

The spelling of 13445321 in words is "thirteen million, four hundred forty-five thousand, three hundred twenty-one".