13281366 has 16 divisors (see below), whose sum is σ = 30357504. Its totient is φ = 3794664.

The previous prime is 13281329. The next prime is 13281371. The reversal of 13281366 is 66318231.

It is a congruent number.

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, 158070 + ... + 158153.

It is an arithmetic number, because the mean of its divisors is an integer number (1897344).

Almost surely, 2^13281366 is an apocalyptic number.

13281366 is an abundant number, since it is smaller than the sum of its proper divisors (17076138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13281366 is a wasteful number, since it uses less digits than its factorization.

13281366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316235.

The product of its digits is 5184, while the sum is 30.

The square root of 13281366 is about 3644.3608493123. The cubic root of 13281366 is about 236.8177487572.

Adding to 13281366 its reverse (66318231), we get a palindrome (79599597).

The spelling of 13281366 in words is "thirteen million, two hundred eighty-one thousand, three hundred sixty-six".