13281001 has 2 divisors, whose sum is σ = 13281002. Its totient is φ = 13281000.

The previous prime is 13280987. The next prime is 13281017. The reversal of 13281001 is 10018231.

It is an a-pointer prime, because the next prime (13281017) can be obtained adding 13281001 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9954025 + 3326976 = 3155^2 + 1824^2 .

It is a cyclic number.

It is not a de Polignac number, because 13281001 - 2⁷ = 13280873 is a prime.

It is not a weakly prime, because it can be changed into another prime (13281031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6640500 + 6640501.

It is an arithmetic number, because the mean of its divisors is an integer number (6640501).

Almost surely, 2^13281001 is an apocalyptic number.

It is an amenable number.

13281001 is a deficient number, since it is larger than the sum of its proper divisors (1).

13281001 is an equidigital number, since it uses as much as digits as its factorization.

13281001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 13281001 is about 3644.3107716000. The cubic root of 13281001 is about 236.8155793199.

Adding to 13281001 its reverse (10018231), we get a palindrome (23299232).

The spelling of 13281001 in words is "thirteen million, two hundred eighty-one thousand, one".