13722161 has 8 divisors (see below), whose sum is σ = 14690400. Its totient is φ = 12778560.

The previous prime is 13722157. The next prime is 13722197. The reversal of 13722161 is 16122731.

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

It is a cyclic number.

It is not a de Polignac number, because 13722161 - 2² = 13722157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13722361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5000 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (1836300).

Almost surely, 2^13722161 is an apocalyptic number.

It is an amenable number.

13722161 is a deficient number, since it is larger than the sum of its proper divisors (968239).

13722161 is a wasteful number, since it uses less digits than its factorization.

13722161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12319.

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

The square root of 13722161 is about 3704.3435315856. The cubic root of 13722161 is about 239.4092007797.

Adding to 13722161 its reverse (16122731), we get a palindrome (29844892).

The spelling of 13722161 in words is "thirteen million, seven hundred twenty-two thousand, one hundred sixty-one".