13721722 has 16 divisors (see below), whose sum is σ = 23667840. Its totient is φ = 5844528.

The previous prime is 13721713. The next prime is 13721723. The reversal of 13721722 is 22712731.

It is not an unprimeable number, because it can be changed into a prime (13721723) 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 7 ways as a sum of consecutive naturals, for example, 597 + ... + 5272.

It is an arithmetic number, because the mean of its divisors is an integer number (1479240).

Almost surely, 2^13721722 is an apocalyptic number.

13721722 is a deficient number, since it is larger than the sum of its proper divisors (9946118).

13721722 is a wasteful number, since it uses less digits than its factorization.

13721722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6045.

The product of its digits is 1176, while the sum is 25.

The square root of 13721722 is about 3704.2842763481. The cubic root of 13721722 is about 239.4066476891.

The spelling of 13721722 in words is "thirteen million, seven hundred twenty-one thousand, seven hundred twenty-two".