13720522 has 8 divisors (see below), whose sum is σ = 21018816. Its totient is φ = 6714252.

The previous prime is 13720519. The next prime is 13720523. The reversal of 13720522 is 22502731.

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

It is a junction number, because it is equal to n+sod(n) for n = 13720493 and 13720502.

It is not an unprimeable number, because it can be changed into a prime (13720523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72888 + ... + 73075.

It is an arithmetic number, because the mean of its divisors is an integer number (2627352).

Almost surely, 2^13720522 is an apocalyptic number.

13720522 is a deficient number, since it is larger than the sum of its proper divisors (7298294).

13720522 is a wasteful number, since it uses less digits than its factorization.

13720522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146012.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 13720522 is about 3704.1222981970. The cubic root of 13720522 is about 239.3996685760.

The spelling of 13720522 in words is "thirteen million, seven hundred twenty thousand, five hundred twenty-two".