12660261 has 8 divisors (see below), whose sum is σ = 16914720. Its totient is φ = 8422992.

The previous prime is 12660229. The next prime is 12660283. The reversal of 12660261 is 16206621.

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

It is not a de Polignac number, because 12660261 - 2⁵ = 12660229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12660961) 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, 2466 + ... + 5603.

It is an arithmetic number, because the mean of its divisors is an integer number (2114340).

Almost surely, 2^12660261 is an apocalyptic number.

It is an amenable number.

12660261 is a deficient number, since it is larger than the sum of its proper divisors (4254459).

12660261 is an equidigital number, since it uses as much as digits as its factorization.

12660261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8595.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 12660261 is about 3558.1260517300. The cubic root of 12660261 is about 233.0670538344.

Adding to 12660261 its reverse (16206621), we get a palindrome (28866882).

It can be divided in two parts, 12660 and 261, that added together give a palindrome (12921).

The spelling of 12660261 in words is "twelve million, six hundred sixty thousand, two hundred sixty-one".