13857543 has 36 divisors (see below), whose sum is σ = 23696400. Its totient is φ = 7800408.

The previous prime is 13857521. The next prime is 13857551. The reversal of 13857543 is 34575831.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 13857543 - 2⁵ = 13857511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13857498 and 13857507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13857343) 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 35 ways as a sum of consecutive naturals, for example, 206796 + ... + 206862.

Almost surely, 2^13857543 is an apocalyptic number.

13857543 is a deficient number, since it is larger than the sum of its proper divisors (9838857).

13857543 is an frugal number, since it uses more digits than its factorization.

13857543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 77 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 13857543 is about 3722.5720946679. The cubic root of 13857543 is about 240.1939577927.

It can be divided in two parts, 13857 and 543, that added together give a square (14400 = 120²).

The spelling of 13857543 in words is "thirteen million, eight hundred fifty-seven thousand, five hundred forty-three".