13746721 has 8 divisors (see below), whose sum is σ = 14196800. Its totient is φ = 13300848.

The previous prime is 13746653. The next prime is 13746731. The reversal of 13746721 is 12764731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13746721 - 2⁹ = 13746209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13746731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6430 + ... + 8296.

It is an arithmetic number, because the mean of its divisors is an integer number (1774600).

Almost surely, 2^13746721 is an apocalyptic number.

It is an amenable number.

13746721 is a deficient number, since it is larger than the sum of its proper divisors (450079).

13746721 is a wasteful number, since it uses less digits than its factorization.

13746721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103.

The product of its digits is 7056, while the sum is 31.

The square root of 13746721 is about 3707.6570769153. The cubic root of 13746721 is about 239.5519476231.

The spelling of 13746721 in words is "thirteen million, seven hundred forty-six thousand, seven hundred twenty-one".