12205667 has 4 divisors (see below), whose sum is σ = 12212760. Its totient is φ = 12198576.

The previous prime is 12205649. The next prime is 12205691. The reversal of 12205667 is 76650221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12205667 - 2¹⁴ = 12189283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12205867) 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, 863 + ... + 5015.

It is an arithmetic number, because the mean of its divisors is an integer number (3053190).

Almost surely, 2^12205667 is an apocalyptic number.

12205667 is a deficient number, since it is larger than the sum of its proper divisors (7093).

12205667 is an equidigital number, since it uses as much as digits as its factorization.

12205667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7092.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 12205667 is about 3493.6609738210. The cubic root of 12205667 is about 230.2433907412.

Adding to 12205667 its reverse (76650221), we get a palindrome (88855888).

The spelling of 12205667 in words is "twelve million, two hundred five thousand, six hundred sixty-seven".