12660535 has 4 divisors (see below), whose sum is σ = 15192648. Its totient is φ = 10128424.

The previous prime is 12660523. The next prime is 12660541. The reversal of 12660535 is 53506621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12660535 - 2²¹ = 10563383 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 1266049 + ... + 1266058.

It is an arithmetic number, because the mean of its divisors is an integer number (3798162).

Almost surely, 2^12660535 is an apocalyptic number.

12660535 is a deficient number, since it is larger than the sum of its proper divisors (2532113).

12660535 is an equidigital number, since it uses as much as digits as its factorization.

12660535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532112.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 12660535 is about 3558.1645549356. The cubic root of 12660535 is about 233.0687352087.

The spelling of 12660535 in words is "twelve million, six hundred sixty thousand, five hundred thirty-five".