13602221 has 2 divisors, whose sum is σ = 13602222. Its totient is φ = 13602220.

The previous prime is 13602217. The next prime is 13602229. The reversal of 13602221 is 12220631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13586596 + 15625 = 3686^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 13602221 - 2² = 13602217 is a prime.

It is a super-2 number, since 2×13602221² = 370040832265682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13602221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13602229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6801110 + 6801111.

It is an arithmetic number, because the mean of its divisors is an integer number (6801111).

Almost surely, 2^13602221 is an apocalyptic number.

It is an amenable number.

13602221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13602221 is an equidigital number, since it uses as much as digits as its factorization.

13602221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 13602221 is about 3688.1188972158. The cubic root of 13602221 is about 238.7096314339.

Adding to 13602221 its reverse (12220631), we get a palindrome (25822852).

The spelling of 13602221 in words is "thirteen million, six hundred two thousand, two hundred twenty-one".