13720156 has 12 divisors (see below), whose sum is σ = 25422768. Its totient is φ = 6456512.

The previous prime is 13720129. The next prime is 13720159. The reversal of 13720156 is 65102731.

13720156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13720156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13720159) 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, 100816 + ... + 100951.

It is an arithmetic number, because the mean of its divisors is an integer number (2118564).

Almost surely, 2^13720156 is an apocalyptic number.

It is an amenable number.

13720156 is a deficient number, since it is larger than the sum of its proper divisors (11702612).

13720156 is a wasteful number, since it uses less digits than its factorization.

13720156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201788 (or 201786 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 13720156 is about 3704.0728934512. The cubic root of 13720156 is about 239.3975398655.

Adding to 13720156 its reverse (65102731), we get a palindrome (78822887).

The spelling of 13720156 in words is "thirteen million, seven hundred twenty thousand, one hundred fifty-six".