13721541 has 16 divisors (see below), whose sum is σ = 18774720. Its totient is φ = 8910720.

The previous prime is 13721537. The next prime is 13721563. The reversal of 13721541 is 14512731.

13721541 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13721541 - 2² = 13721537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13721581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33345 + ... + 33753.

It is an arithmetic number, because the mean of its divisors is an integer number (1173420).

Almost surely, 2^13721541 is an apocalyptic number.

It is an amenable number.

13721541 is a deficient number, since it is larger than the sum of its proper divisors (5053179).

13721541 is a wasteful number, since it uses less digits than its factorization.

13721541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676.

The product of its digits is 840, while the sum is 24.

The square root of 13721541 is about 3704.2598450973. The cubic root of 13721541 is about 239.4055950323.

The spelling of 13721541 in words is "thirteen million, seven hundred twenty-one thousand, five hundred forty-one".