13606321 has 4 divisors (see below), whose sum is σ = 13619700. Its totient is φ = 13592944.

The previous prime is 13606309. The next prime is 13606339. The reversal of 13606321 is 12360631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6071296 + 7535025 = 2464^2 + 2745^2 .

It is a cyclic number.

It is not a de Polignac number, because 13606321 - 2⁷ = 13606193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13606292 and 13606301.

It is not an unprimeable number, because it can be changed into a prime (13606391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5026 + ... + 7243.

It is an arithmetic number, because the mean of its divisors is an integer number (3404925).

Almost surely, 2^13606321 is an apocalyptic number.

It is an amenable number.

13606321 is a deficient number, since it is larger than the sum of its proper divisors (13379).

13606321 is a wasteful number, since it uses less digits than its factorization.

13606321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13378.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 13606321 is about 3688.6746942500. The cubic root of 13606321 is about 238.7336130854.

Adding to 13606321 its reverse (12360631), we get a palindrome (25966952).

The spelling of 13606321 in words is "thirteen million, six hundred six thousand, three hundred twenty-one".