12286661 has 4 divisors (see below), whose sum is σ = 12470112. Its totient is φ = 12103212.

The previous prime is 12286649. The next prime is 12286667. The reversal of 12286661 is 16668221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16668221 = 47 ⋅354643.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12286661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12286667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91625 + ... + 91758.

It is an arithmetic number, because the mean of its divisors is an integer number (3117528).

Almost surely, 2^12286661 is an apocalyptic number.

It is an amenable number.

12286661 is a deficient number, since it is larger than the sum of its proper divisors (183451).

12286661 is an equidigital number, since it uses as much as digits as its factorization.

12286661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183450.

The product of its digits is 6912, while the sum is 32.

The square root of 12286661 is about 3505.2333731151. The cubic root of 12286661 is about 230.7515491210.

The spelling of 12286661 in words is "twelve million, two hundred eighty-six thousand, six hundred sixty-one".