12166487 has 4 divisors (see below), whose sum is σ = 12179016. Its totient is φ = 12153960.

The previous prime is 12166481. The next prime is 12166493. The reversal of 12166487 is 78466121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78466121 = 103 ⋅761807.

It is an interprime number because it is at equal distance from previous prime (12166481) and next prime (12166493).

It is a cyclic number.

It is not a de Polignac number, because 12166487 - 2⁶ = 12166423 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 (12166481) 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, 4673 + ... + 6794.

It is an arithmetic number, because the mean of its divisors is an integer number (3044754).

Almost surely, 2^12166487 is an apocalyptic number.

12166487 is a deficient number, since it is larger than the sum of its proper divisors (12529).

12166487 is a wasteful number, since it uses less digits than its factorization.

12166487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12528.

The product of its digits is 16128, while the sum is 35.

The square root of 12166487 is about 3488.0491682314. The cubic root of 12166487 is about 229.9967674404.

The spelling of 12166487 in words is "twelve million, one hundred sixty-six thousand, four hundred eighty-seven".