13721126 has 4 divisors (see below), whose sum is σ = 20581692. Its totient is φ = 6860562.

The previous prime is 13721111. The next prime is 13721129. The reversal of 13721126 is 62112731.

13721126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13721129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3430280 + ... + 3430283.

It is an arithmetic number, because the mean of its divisors is an integer number (5145423).

Almost surely, 2^13721126 is an apocalyptic number.

13721126 is a deficient number, since it is larger than the sum of its proper divisors (6860566).

13721126 is an equidigital number, since it uses as much as digits as its factorization.

13721126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6860565.

The product of its digits is 504, while the sum is 23.

The square root of 13721126 is about 3704.2038280851. The cubic root of 13721126 is about 239.4031814471.

Adding to 13721126 its reverse (62112731), we get a palindrome (75833857).

The spelling of 13721126 in words is "thirteen million, seven hundred twenty-one thousand, one hundred twenty-six".