13741721 has 4 divisors (see below), whose sum is σ = 15704832. Its totient is φ = 11778612.

The previous prime is 13741709. The next prime is 13741723. The reversal of 13741721 is 12714731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12714731 = 29 ⋅438439.

It is a cyclic number.

It is not a de Polignac number, because 13741721 - 2¹⁰ = 13740697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13741723) 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, 981545 + ... + 981558.

It is an arithmetic number, because the mean of its divisors is an integer number (3926208).

Almost surely, 2^13741721 is an apocalyptic number.

It is an amenable number.

13741721 is a deficient number, since it is larger than the sum of its proper divisors (1963111).

13741721 is an equidigital number, since it uses as much as digits as its factorization.

13741721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963110.

The product of its digits is 1176, while the sum is 26.

The square root of 13741721 is about 3706.9827353253. The cubic root of 13741721 is about 239.5229005753.

The spelling of 13741721 in words is "thirteen million, seven hundred forty-one thousand, seven hundred twenty-one".