11857541 has 4 divisors (see below), whose sum is σ = 11871084. Its totient is φ = 11844000.

The previous prime is 11857529. The next prime is 11857543. The reversal of 11857541 is 14575811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5712100 + 6145441 = 2390^2 + 2479^2 .

It is a cyclic number.

It is not a de Polignac number, because 11857541 - 2⁶ = 11857477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11857498 and 11857507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11857543) 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, 5360 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (2967771).

Almost surely, 2^11857541 is an apocalyptic number.

It is an amenable number.

11857541 is a deficient number, since it is larger than the sum of its proper divisors (13543).

11857541 is an equidigital number, since it uses as much as digits as its factorization.

11857541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13542.

The product of its digits is 5600, while the sum is 32.

The square root of 11857541 is about 3443.4780382631. The cubic root of 11857541 is about 228.0332682039.

The spelling of 11857541 in words is "eleven million, eight hundred fifty-seven thousand, five hundred forty-one".