13251321 has 12 divisors (see below), whose sum is σ = 19548672. Its totient is φ = 8645976.

The previous prime is 13251319. The next prime is 13251349. The reversal of 13251321 is 12315231.

13251321 is a `hidden beast` number, since 132 + 513 + 21 = 666.

It is not a de Polignac number, because 13251321 - 2¹ = 13251319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13251294 and 13251303.

It is not an unprimeable number, because it can be changed into a prime (13251311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15241 + ... + 16086.

It is an arithmetic number, because the mean of its divisors is an integer number (1629056).

Almost surely, 2^13251321 is an apocalyptic number.

It is an amenable number.

13251321 is a deficient number, since it is larger than the sum of its proper divisors (6297351).

13251321 is a wasteful number, since it uses less digits than its factorization.

13251321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31380 (or 31377 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 13251321 is about 3640.2363934228. The cubic root of 13251321 is about 236.6390381907.

Adding to 13251321 its reverse (12315231), we get a palindrome (25566552).

The spelling of 13251321 in words is "thirteen million, two hundred fifty-one thousand, three hundred twenty-one".