12138524 has 12 divisors (see below), whose sum is σ = 21559944. Its totient is φ = 5978544.

The previous prime is 12138523. The next prime is 12138541. The reversal of 12138524 is 42583121.

It is a junction number, because it is equal to n+sod(n) for n = 12138493 and 12138502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22379 + ... + 22914.

It is an arithmetic number, because the mean of its divisors is an integer number (1796662).

Almost surely, 2^12138524 is an apocalyptic number.

It is an amenable number.

12138524 is a deficient number, since it is larger than the sum of its proper divisors (9421420).

12138524 is a wasteful number, since it uses less digits than its factorization.

12138524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45364 (or 45362 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 12138524 is about 3484.0384613262. The cubic root of 12138524 is about 229.8204269421.

The spelling of 12138524 in words is "twelve million, one hundred thirty-eight thousand, five hundred twenty-four".