12135556 has 24 divisors (see below), whose sum is σ = 21986496. Its totient is φ = 5856480.

The previous prime is 12135551. The next prime is 12135577. The reversal of 12135556 is 65553121.

It is not an unprimeable number, because it can be changed into a prime (12135551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24471 + ... + 24961.

It is an arithmetic number, because the mean of its divisors is an integer number (916104).

Almost surely, 2^12135556 is an apocalyptic number.

It is an amenable number.

12135556 is a deficient number, since it is larger than the sum of its proper divisors (9850940).

12135556 is a wasteful number, since it uses less digits than its factorization.

12135556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 697 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 12135556 is about 3483.6124928011. The cubic root of 12135556 is about 229.8016942245.

Adding to 12135556 its reverse (65553121), we get a palindrome (77688677).

The spelling of 12135556 in words is "twelve million, one hundred thirty-five thousand, five hundred fifty-six".