13257943 has 4 divisors (see below), whose sum is σ = 14037840. Its totient is φ = 12478048.

The previous prime is 13257929. The next prime is 13257947. The reversal of 13257943 is 34975231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34975231 = 1433 ⋅24407.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13257943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13257899 and 13257908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13257947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389923 + ... + 389956.

It is an arithmetic number, because the mean of its divisors is an integer number (3509460).

Almost surely, 2^13257943 is an apocalyptic number.

13257943 is a deficient number, since it is larger than the sum of its proper divisors (779897).

13257943 is an equidigital number, since it uses as much as digits as its factorization.

13257943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779896.

The product of its digits is 22680, while the sum is 34.

The square root of 13257943 is about 3641.1458361346. The cubic root of 13257943 is about 236.6784496767.

The spelling of 13257943 in words is "thirteen million, two hundred fifty-seven thousand, nine hundred forty-three".