13721446 has 8 divisors (see below), whose sum is σ = 20597904. Its totient is φ = 6855480.

The previous prime is 13721443. The next prime is 13721447. The reversal of 13721446 is 64412731.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13721441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3636 + ... + 6376.

It is an arithmetic number, because the mean of its divisors is an integer number (2574738).

Almost surely, 2^13721446 is an apocalyptic number.

13721446 is a deficient number, since it is larger than the sum of its proper divisors (6876458).

13721446 is a wasteful number, since it uses less digits than its factorization.

13721446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5246.

The product of its digits is 4032, while the sum is 28.

The square root of 13721446 is about 3704.2470220006. The cubic root of 13721446 is about 239.4050425292.

The spelling of 13721446 in words is "thirteen million, seven hundred twenty-one thousand, four hundred forty-six".