12109534 has 8 divisors (see below), whose sum is σ = 18383400. Its totient is φ = 5981736.

The previous prime is 12109507. The next prime is 12109543. The reversal of 12109534 is 43590121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12109499 and 12109508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36309 + ... + 36640.

It is an arithmetic number, because the mean of its divisors is an integer number (2297925).

Almost surely, 2^12109534 is an apocalyptic number.

12109534 is a deficient number, since it is larger than the sum of its proper divisors (6273866).

12109534 is an equidigital number, since it uses as much as digits as its factorization.

12109534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73034.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12109534 is about 3479.8755724882. The cubic root of 12109534 is about 229.6373238137.

Adding to 12109534 its reverse (43590121), we get a palindrome (55699655).

The spelling of 12109534 in words is "twelve million, one hundred nine thousand, five hundred thirty-four".