13721841 has 24 divisors (see below), whose sum is σ = 22800960. Its totient is φ = 7789536.

The previous prime is 13721837. The next prime is 13721849. The reversal of 13721841 is 14812731.

It is not a de Polignac number, because 13721841 - 2² = 13721837 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13721849) 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 23 ways as a sum of consecutive naturals, for example, 10270 + ... + 11528.

It is an arithmetic number, because the mean of its divisors is an integer number (950040).

Almost surely, 2^13721841 is an apocalyptic number.

It is an amenable number.

13721841 is a deficient number, since it is larger than the sum of its proper divisors (9079119).

13721841 is a wasteful number, since it uses less digits than its factorization.

13721841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445 (or 1442 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 13721841 is about 3704.3003387954. The cubic root of 13721841 is about 239.4073397624.

The spelling of 13721841 in words is "thirteen million, seven hundred twenty-one thousand, eight hundred forty-one".