13722201 has 6 divisors (see below), whose sum is σ = 19820970. Its totient is φ = 9148128.

The previous prime is 13722197. The next prime is 13722209. The reversal of 13722201 is 10222731.

It can be written as a sum of positive squares in only one way, i.e., 11048976 + 2673225 = 3324^2 + 1635^2 .

It is not a de Polignac number, because 13722201 - 2² = 13722197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13722209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 762336 + ... + 762353.

It is an arithmetic number, because the mean of its divisors is an integer number (3303495).

Almost surely, 2^13722201 is an apocalyptic number.

It is an amenable number.

13722201 is a deficient number, since it is larger than the sum of its proper divisors (6098769).

13722201 is a wasteful number, since it uses less digits than its factorization.

13722201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524695 (or 1524692 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 13722201 is about 3704.3489306489. The cubic root of 13722201 is about 239.4094334049.

Adding to 13722201 its reverse (10222731), we get a palindrome (23944932).

The spelling of 13722201 in words is "thirteen million, seven hundred twenty-two thousand, two hundred one".