13281385 has 8 divisors (see below), whose sum is σ = 17163720. Its totient is φ = 9807744.

The previous prime is 13281377. The next prime is 13281427. The reversal of 13281385 is 58318231.

13281385 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 4 ways, for example, as 3143529 + 10137856 = 1773^2 + 3184^2 .

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 13281385 - 2³ = 13281377 is a prime.

It is an unprimeable number.

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, 102100 + ... + 102229.

It is an arithmetic number, because the mean of its divisors is an integer number (2145465).

Almost surely, 2^13281385 is an apocalyptic number.

It is an amenable number.

13281385 is a deficient number, since it is larger than the sum of its proper divisors (3882335).

13281385 is a wasteful number, since it uses less digits than its factorization.

13281385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204347.

The product of its digits is 5760, while the sum is 31.

The square root of 13281385 is about 3644.3634560784. The cubic root of 13281385 is about 236.8178616857.

The spelling of 13281385 in words is "thirteen million, two hundred eighty-one thousand, three hundred eighty-five".