13039321 has 9 divisors (see below), whose sum is σ = 13718271. Its totient is φ = 12392952.

The previous prime is 13039291. The next prime is 13039331. The reversal of 13039321 is 12393031.

The square root of 13039321 is 3611.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3822025 + 9217296 = 1955^2 + 3036^2 .

It is not a de Polignac number, because 13039321 - 2¹¹ = 13037273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13039292 and 13039301.

It is not an unprimeable number, because it can be changed into a prime (13039331) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 82975 + ... + 83131.

Almost surely, 2^13039321 is an apocalyptic number.

13039321 is the 3611-st square number.

13039321 is the 1806-th centered octagonal number.

It is an amenable number.

13039321 is a deficient number, since it is larger than the sum of its proper divisors (678950).

13039321 is an frugal number, since it uses more digits than its factorization.

13039321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 22.

The cubic root of 13039321 is about 235.3702989509.

The spelling of 13039321 in words is "thirteen million, thirty-nine thousand, three hundred twenty-one".