13281337 has 8 divisors (see below), whose sum is σ = 13494600. Its totient is φ = 13069824.

The previous prime is 13281329. The next prime is 13281371. The reversal of 13281337 is 73318231.

It can be written as a sum of positive squares in 4 ways, for example, as 968256 + 12313081 = 984^2 + 3509^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13281337 - 2³ = 13281329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13281377) 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 in 7 ways as a sum of consecutive naturals, for example, 25839 + ... + 26347.

It is an arithmetic number, because the mean of its divisors is an integer number (1686825).

Almost surely, 2^13281337 is an apocalyptic number.

It is an amenable number.

13281337 is a deficient number, since it is larger than the sum of its proper divisors (213263).

13281337 is an equidigital number, since it uses as much as digits as its factorization.

13281337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875.

The product of its digits is 3024, while the sum is 28.

The square root of 13281337 is about 3644.3568705603. The cubic root of 13281337 is about 236.8175763924.

Adding to 13281337 its reverse (73318231), we get a palindrome (86599568).

The spelling of 13281337 in words is "thirteen million, two hundred eighty-one thousand, three hundred thirty-seven".