13721142 has 48 divisors (see below), whose sum is σ = 30017232. Its totient is φ = 4177920.

The previous prime is 13721129. The next prime is 13721143. The reversal of 13721142 is 24112731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13721143) 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 23 ways as a sum of consecutive naturals, for example, 70998 + ... + 71190.

It is an arithmetic number, because the mean of its divisors is an integer number (625359).

Almost surely, 2^13721142 is an apocalyptic number.

13721142 is an abundant number, since it is smaller than the sum of its proper divisors (16296090).

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

13721142 is a wasteful number, since it uses less digits than its factorization.

13721142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 256 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 13721142 is about 3704.2059877928. The cubic root of 13721142 is about 239.4032745019.

Adding to 13721142 its reverse (24112731), we get a palindrome (37833873).

The spelling of 13721142 in words is "thirteen million, seven hundred twenty-one thousand, one hundred forty-two".