13721652 has 72 divisors (see below), whose sum is σ = 41985216. Its totient is φ = 3688704.

The previous prime is 13721627. The next prime is 13721671. The reversal of 13721652 is 25612731.

It is a happy number.

13721652 is a `hidden beast` number, since 1 + 3 + 7 + 2 + 1 + 652 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2683 + ... + 5885.

It is an arithmetic number, because the mean of its divisors is an integer number (583128).

Almost surely, 2^13721652 is an apocalyptic number.

13721652 is a gapful number since it is divisible by the number (12) 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 13721652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20992608).

13721652 is an abundant number, since it is smaller than the sum of its proper divisors (28263564).

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

13721652 is a wasteful number, since it uses less digits than its factorization.

13721652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237 (or 3232 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 13721652 is about 3704.2748278172. The cubic root of 13721652 is about 239.4062405854.

The spelling of 13721652 in words is "thirteen million, seven hundred twenty-one thousand, six hundred fifty-two".