13211257 has 8 divisors (see below), whose sum is σ = 13826376. Its totient is φ = 12609792.

The previous prime is 13211243. The next prime is 13211267. The reversal of 13211257 is 75211231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6007401 + 7203856 = 2451^2 + 2684^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13211257 - 2⁷ = 13211129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13211207) 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 7 ways as a sum of consecutive naturals, for example, 1408 + ... + 5329.

It is an arithmetic number, because the mean of its divisors is an integer number (1728297).

Almost surely, 2^13211257 is an apocalyptic number.

It is an amenable number.

13211257 is a deficient number, since it is larger than the sum of its proper divisors (615119).

13211257 is an equidigital number, since it uses as much as digits as its factorization.

13211257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6827.

The product of its digits is 420, while the sum is 22.

The square root of 13211257 is about 3634.7292884065. The cubic root of 13211257 is about 236.4003128804.

Adding to 13211257 its reverse (75211231), we get a palindrome (88422488).

The spelling of 13211257 in words is "thirteen million, two hundred eleven thousand, two hundred fifty-seven".