13281885 has 12 divisors (see below), whose sum is σ = 23022012. Its totient is φ = 7083648.

The previous prime is 13281823. The next prime is 13281889. The reversal of 13281885 is 58818231.

It can be written as a sum of positive squares in 2 ways, for example, as 7650756 + 5631129 = 2766^2 + 2373^2 .

It is not a de Polignac number, because 13281885 - 2⁸ = 13281629 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13281889) 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 in 11 ways as a sum of consecutive naturals, for example, 147532 + ... + 147621.

It is an arithmetic number, because the mean of its divisors is an integer number (1918501).

Almost surely, 2^13281885 is an apocalyptic number.

13281885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13281885 is a deficient number, since it is larger than the sum of its proper divisors (9740127).

13281885 is a wasteful number, since it uses less digits than its factorization.

13281885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295164 (or 295161 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 13281885 is about 3644.4320545182. The cubic root of 13281885 is about 236.8208334502.

The spelling of 13281885 in words is "thirteen million, two hundred eighty-one thousand, eight hundred eighty-five".