13715257 has 2 divisors, whose sum is σ = 13715258. Its totient is φ = 13715256.

The previous prime is 13715213. The next prime is 13715263. The reversal of 13715257 is 75251731.

13715257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7420176 + 6295081 = 2724^2 + 2509^2 .

It is an emirp because it is prime and its reverse (75251731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13715257 - 2⁷ = 13715129 is a prime.

It is not a weakly prime, because it can be changed into another prime (13715357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6857628 + 6857629.

It is an arithmetic number, because the mean of its divisors is an integer number (6857629).

Almost surely, 2^13715257 is an apocalyptic number.

It is an amenable number.

13715257 is a deficient number, since it is larger than the sum of its proper divisors (1).

13715257 is an equidigital number, since it uses as much as digits as its factorization.

13715257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7350, while the sum is 31.

The square root of 13715257 is about 3703.4115353279. The cubic root of 13715257 is about 239.3690429066.

Adding to 13715257 its reverse (75251731), we get a palindrome (88966988).

The spelling of 13715257 in words is "thirteen million, seven hundred fifteen thousand, two hundred fifty-seven".