13721360 has 20 divisors (see below), whose sum is σ = 31902348. Its totient is φ = 5488512.

The previous prime is 13721353. The next prime is 13721369. The reversal of 13721360 is 6312731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10679824 + 3041536 = 3268^2 + 1744^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13721369) 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, 85679 + ... + 85838.

Almost surely, 2^13721360 is an apocalyptic number.

13721360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13721360 is an abundant number, since it is smaller than the sum of its proper divisors (18180988).

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

13721360 is a wasteful number, since it uses less digits than its factorization.

13721360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171530 (or 171524 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 13721360 is about 3704.2354136853. The cubic root of 13721360 is about 239.4045423662.

The spelling of 13721360 in words is "thirteen million, seven hundred twenty-one thousand, three hundred sixty".