13720147 has 12 divisors (see below), whose sum is σ = 16801320. Its totient is φ = 11140416.

The previous prime is 13720129. The next prime is 13720159. The reversal of 13720147 is 74102731.

It is a happy number.

13720147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-13720147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13720127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6438 + ... + 8299.

It is an arithmetic number, because the mean of its divisors is an integer number (1400110).

Almost surely, 2^13720147 is an apocalyptic number.

13720147 is a deficient number, since it is larger than the sum of its proper divisors (3081173).

13720147 is a wasteful number, since it uses less digits than its factorization.

13720147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14770 (or 14763 counting only the distinct ones).

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

The square root of 13720147 is about 3704.0716785721. The cubic root of 13720147 is about 239.3974875197.

Adding to 13720147 its reverse (74102731), we get a palindrome (87822878).

The spelling of 13720147 in words is "thirteen million, seven hundred twenty thousand, one hundred forty-seven".