13281612 has 12 divisors (see below), whose sum is σ = 30990456. Its totient is φ = 4427200.

The previous prime is 13281571. The next prime is 13281613. The reversal of 13281612 is 21618231.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13281613) 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 3 ways as a sum of consecutive naturals, for example, 553389 + ... + 553412.

It is an arithmetic number, because the mean of its divisors is an integer number (2582538).

Almost surely, 2^13281612 is an apocalyptic number.

13281612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13281612 is an abundant number, since it is smaller than the sum of its proper divisors (17708844).

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

13281612 is a wasteful number, since it uses less digits than its factorization.

13281612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106808 (or 1106806 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 13281612 is about 3644.3945999301. The cubic root of 13281612 is about 236.8192108760.

Adding to 13281612 its reverse (21618231), we get a palindrome (34899843).

It can be divided in two parts, 13 and 281612, that added together give a triangular number (281625 = T₇₅₀).

The spelling of 13281612 in words is "thirteen million, two hundred eighty-one thousand, six hundred twelve".