13720242 has 32 divisors (see below), whose sum is σ = 29373120. Its totient is φ = 4259520.

The previous prime is 13720211. The next prime is 13720247. The reversal of 13720242 is 24202731.

13720242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13720247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5968 + ... + 7940.

It is an arithmetic number, because the mean of its divisors is an integer number (917910).

Almost surely, 2^13720242 is an apocalyptic number.

13720242 is an abundant number, since it is smaller than the sum of its proper divisors (15652878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13720242 is a wasteful number, since it uses less digits than its factorization.

13720242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 13720242 is about 3704.0845022758. The cubic root of 13720242 is about 239.3980400577.

Adding to 13720242 its reverse (24202731), we get a palindrome (37922973).

The spelling of 13720242 in words is "thirteen million, seven hundred twenty thousand, two hundred forty-two".