11857543 has 2 divisors, whose sum is σ = 11857544. Its totient is φ = 11857542.

The previous prime is 11857529. The next prime is 11857589. The reversal of 11857543 is 34575811.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34575811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11857543 - 2¹⁷ = 11726471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11857499 and 11857508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11857523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5928771 + 5928772.

It is an arithmetic number, because the mean of its divisors is an integer number (5928772).

Almost surely, 2^11857543 is an apocalyptic number.

11857543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11857543 is an equidigital number, since it uses as much as digits as its factorization.

11857543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 34.

The square root of 11857543 is about 3443.4783286671. The cubic root of 11857543 is about 228.0332810246.

The spelling of 11857543 in words is "eleven million, eight hundred fifty-seven thousand, five hundred forty-three".