13257386 has 8 divisors (see below), whose sum is σ = 20062404. Its totient is φ = 6569920.

The previous prime is 13257329. The next prime is 13257389. The reversal of 13257386 is 68375231.

It can be written as a sum of positive squares in 2 ways, for example, as 9333025 + 3924361 = 3055^2 + 1981^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13257389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29105 + ... + 29556.

Almost surely, 2^13257386 is an apocalyptic number.

13257386 is a deficient number, since it is larger than the sum of its proper divisors (6805018).

13257386 is a wasteful number, since it uses less digits than its factorization.

13257386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58776.

The product of its digits is 30240, while the sum is 35.

The square root of 13257386 is about 3641.0693484195. The cubic root of 13257386 is about 236.6751351419.

The spelling of 13257386 in words is "thirteen million, two hundred fifty-seven thousand, three hundred eighty-six".