13107257 has 4 divisors (see below), whose sum is σ = 13158516. Its totient is φ = 13056000.

The previous prime is 13107251. The next prime is 13107293. The reversal of 13107257 is 75270131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75270131 = 251 ⋅299881.

It can be written as a sum of positive squares in 2 ways, for example, as 12033961 + 1073296 = 3469^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 13107257 - 2¹² = 13103161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13107251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25244 + ... + 25757.

It is an arithmetic number, because the mean of its divisors is an integer number (3289629).

Almost surely, 2^13107257 is an apocalyptic number.

It is an amenable number.

13107257 is a deficient number, since it is larger than the sum of its proper divisors (51259).

13107257 is an equidigital number, since it uses as much as digits as its factorization.

13107257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51258.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 13107257 is about 3620.3945917538. The cubic root of 13107257 is about 235.7783576928.

Adding to 13107257 its reverse (75270131), we get a palindrome (88377388).

The spelling of 13107257 in words is "thirteen million, one hundred seven thousand, two hundred fifty-seven".