13727257 has 4 divisors (see below), whose sum is σ = 13952356. Its totient is φ = 13502160.

The previous prime is 13727249. The next prime is 13727261. The reversal of 13727257 is 75272731.

It is a happy number.

13727257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7557001 + 6170256 = 2749^2 + 2484^2 .

It is a cyclic number.

It is not a de Polignac number, because 13727257 - 2³ = 13727249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13727227) 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, 112458 + ... + 112579.

It is an arithmetic number, because the mean of its divisors is an integer number (3488089).

Almost surely, 2^13727257 is an apocalyptic number.

It is an amenable number.

13727257 is a deficient number, since it is larger than the sum of its proper divisors (225099).

13727257 is an equidigital number, since it uses as much as digits as its factorization.

13727257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225098.

The product of its digits is 20580, while the sum is 34.

The square root of 13727257 is about 3705.0313089095. The cubic root of 13727257 is about 239.4388335830.

Adding to 13727257 its reverse (75272731), we get a palindrome (88999988).

The spelling of 13727257 in words is "thirteen million, seven hundred twenty-seven thousand, two hundred fifty-seven".