12128167 has 4 divisors (see below), whose sum is σ = 12215560. Its totient is φ = 12040776.

The previous prime is 12128141. The next prime is 12128173. The reversal of 12128167 is 76182121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12128167 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 (12128117) 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, 43488 + ... + 43765.

It is an arithmetic number, because the mean of its divisors is an integer number (3053890).

Almost surely, 2^12128167 is an apocalyptic number.

12128167 is a deficient number, since it is larger than the sum of its proper divisors (87393).

12128167 is an equidigital number, since it uses as much as digits as its factorization.

12128167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87392.

The product of its digits is 1344, while the sum is 28.

The square root of 12128167 is about 3482.5517943026. The cubic root of 12128167 is about 229.7550448179.

The spelling of 12128167 in words is "twelve million, one hundred twenty-eight thousand, one hundred sixty-seven".