13281660 has 144 divisors (see below), whose sum is σ = 46964736. Its totient is φ = 2975616.

The previous prime is 13281647. The next prime is 13281661. The reversal of 13281660 is 6618231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13281661) 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 47 ways as a sum of consecutive naturals, for example, 104517 + ... + 104643.

It is an arithmetic number, because the mean of its divisors is an integer number (326144).

Almost surely, 2^13281660 is an apocalyptic number.

13281660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13281660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23482368).

13281660 is an abundant number, since it is smaller than the sum of its proper divisors (33683076).

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

13281660 is a wasteful number, since it uses less digits than its factorization.

13281660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 13281660 is about 3644.4011853801. The cubic root of 13281660 is about 236.8194961654.

Adding to 13281660 its reverse (6618231), we get a palindrome (19899891).

The spelling of 13281660 in words is "thirteen million, two hundred eighty-one thousand, six hundred sixty".