13721411 has 4 divisors (see below), whose sum is σ = 14968824. Its totient is φ = 12474000.

The previous prime is 13721381. The next prime is 13721419. The reversal of 13721411 is 11412731.

It is a happy number.

13721411 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-13721411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13721419) 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 3 ways as a sum of consecutive naturals, for example, 623690 + ... + 623711.

It is an arithmetic number, because the mean of its divisors is an integer number (3742206).

Almost surely, 2^13721411 is an apocalyptic number.

13721411 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13721411 is a deficient number, since it is larger than the sum of its proper divisors (1247413).

13721411 is a wasteful number, since it uses less digits than its factorization.

13721411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247412.

The product of its digits is 168, while the sum is 20.

The square root of 13721411 is about 3704.2422976906. The cubic root of 13721411 is about 239.4048389747.

The spelling of 13721411 in words is "thirteen million, seven hundred twenty-one thousand, four hundred eleven".