13720745 has 8 divisors (see below), whose sum is σ = 16744320. Its totient is φ = 10790320.

The previous prime is 13720739. The next prime is 13720753. The reversal of 13720745 is 54702731.

13720745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13720745 - 2¹² = 13716649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22961 + ... + 23550.

It is an arithmetic number, because the mean of its divisors is an integer number (2093040).

Almost surely, 2^13720745 is an apocalyptic number.

It is an amenable number.

13720745 is a deficient number, since it is larger than the sum of its proper divisors (3023575).

13720745 is an equidigital number, since it uses as much as digits as its factorization.

13720745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46575.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 13720745 is about 3704.1523996726. The cubic root of 13720745 is about 239.4009655586.

The spelling of 13720745 in words is "thirteen million, seven hundred twenty thousand, seven hundred forty-five".