12109532 has 24 divisors (see below), whose sum is σ = 21731136. Its totient is φ = 5902848.

The previous prime is 12109507. The next prime is 12109543. The reversal of 12109532 is 23590121.

It is a junction number, because it is equal to n+sod(n) for n = 12109498 and 12109507.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 32813 + ... + 33179.

It is an arithmetic number, because the mean of its divisors is an integer number (905464).

Almost surely, 2^12109532 is an apocalyptic number.

It is an amenable number.

12109532 is a deficient number, since it is larger than the sum of its proper divisors (9621604).

12109532 is a wasteful number, since it uses less digits than its factorization.

12109532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 12109532 is about 3479.8752851216. The cubic root of 12109532 is about 229.6373111715.

Adding to 12109532 its reverse (23590121), we get a palindrome (35699653).

The spelling of 12109532 in words is "twelve million, one hundred nine thousand, five hundred thirty-two".