11861523 has 6 divisors (see below), whose sum is σ = 17133324. Its totient is φ = 7907676.

The previous prime is 11861467. The next prime is 11861527. The reversal of 11861523 is 32516811.

It is not a de Polignac number, because 11861523 - 2⁹ = 11861011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11861527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 658965 + ... + 658982.

It is an arithmetic number, because the mean of its divisors is an integer number (2855554).

Almost surely, 2^11861523 is an apocalyptic number.

11861523 is a deficient number, since it is larger than the sum of its proper divisors (5271801).

11861523 is a wasteful number, since it uses less digits than its factorization.

11861523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317953 (or 1317950 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 11861523 is about 3444.0561842107. The cubic root of 11861523 is about 228.0587913948.

The spelling of 11861523 in words is "eleven million, eight hundred sixty-one thousand, five hundred twenty-three".