13249321 has 2 divisors, whose sum is σ = 13249322. Its totient is φ = 13249320.

The previous prime is 13249319. The next prime is 13249331. The reversal of 13249321 is 12394231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9388096 + 3861225 = 3064^2 + 1965^2 .

It is a cyclic number.

It is not a de Polignac number, because 13249321 - 2¹ = 13249319 is a prime.

It is a super-2 number, since 2×13249321² = 351089013922082, which contains 22 as substring.

Together with 13249319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13249331) 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, 6624660 + 6624661.

It is an arithmetic number, because the mean of its divisors is an integer number (6624661).

Almost surely, 2^13249321 is an apocalyptic number.

It is an amenable number.

13249321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13249321 is an equidigital number, since it uses as much as digits as its factorization.

13249321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 13249321 is about 3639.9616756224. The cubic root of 13249321 is about 236.6271324120.

The spelling of 13249321 in words is "thirteen million, two hundred forty-nine thousand, three hundred twenty-one".