13257613 has 4 divisors (see below), whose sum is σ = 13272700. Its totient is φ = 13242528.

The previous prime is 13257599. The next prime is 13257653. The reversal of 13257613 is 31675231.

13257613 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, and also an emirpimes, since its reverse is a distinct semiprime: 31675231 = 7 ⋅4525033.

It can be written as a sum of positive squares in 2 ways, for example, as 6487209 + 6770404 = 2547^2 + 2602^2 .

It is a cyclic number.

It is not a de Polignac number, because 13257613 - 2¹³ = 13249421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13257653) 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, 6138 + ... + 8011.

It is an arithmetic number, because the mean of its divisors is an integer number (3318175).

Almost surely, 2^13257613 is an apocalyptic number.

It is an amenable number.

13257613 is a deficient number, since it is larger than the sum of its proper divisors (15087).

13257613 is an equidigital number, since it uses as much as digits as its factorization.

13257613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15086.

The product of its digits is 3780, while the sum is 28.

The square root of 13257613 is about 3641.1005204471. The cubic root of 13257613 is about 236.6764859599.

The spelling of 13257613 in words is "thirteen million, two hundred fifty-seven thousand, six hundred thirteen".