13721226 has 16 divisors (see below), whose sum is σ = 27819264. Its totient is φ = 4510944.

The previous prime is 13721209. The next prime is 13721231. The reversal of 13721226 is 62212731.

13721226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13721196 and 13721205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15226 + ... + 16101.

It is an arithmetic number, because the mean of its divisors is an integer number (1738704).

Almost surely, 2^13721226 is an apocalyptic number.

13721226 is an abundant number, since it is smaller than the sum of its proper divisors (14098038).

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

13721226 is a wasteful number, since it uses less digits than its factorization.

13721226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31405.

The product of its digits is 1008, while the sum is 24.

The square root of 13721226 is about 3704.2173262378. The cubic root of 13721226 is about 239.4037630384.

Adding to 13721226 its reverse (62212731), we get a palindrome (75933957).

The spelling of 13721226 in words is "thirteen million, seven hundred twenty-one thousand, two hundred twenty-six".