11605541 has 4 divisors (see below), whose sum is σ = 11714112. Its totient is φ = 11496972.

The previous prime is 11605519. The next prime is 11605549. The reversal of 11605541 is 14550611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11605541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11605549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54125 + ... + 54338.

It is an arithmetic number, because the mean of its divisors is an integer number (2928528).

Almost surely, 2^11605541 is an apocalyptic number.

It is an amenable number.

11605541 is a deficient number, since it is larger than the sum of its proper divisors (108571).

11605541 is a wasteful number, since it uses less digits than its factorization.

11605541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108570.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 11605541 is about 3406.6906228773. The cubic root of 11605541 is about 226.4062770613.

The spelling of 11605541 in words is "eleven million, six hundred five thousand, five hundred forty-one".