12166859 has 8 divisors (see below), whose sum is σ = 12847440. Its totient is φ = 11490336.

The previous prime is 12166853. The next prime is 12166879. The reversal of 12166859 is 95866121.

12166859 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12166859 is a prime.

It is a super-3 number, since 3×12166859³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12166853) 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, 6737 + ... + 8349.

It is an arithmetic number, because the mean of its divisors is an integer number (1605930).

Almost surely, 2^12166859 is an apocalyptic number.

12166859 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12166859 is a deficient number, since it is larger than the sum of its proper divisors (680581).

12166859 is a wasteful number, since it uses less digits than its factorization.

12166859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029.

The product of its digits is 25920, while the sum is 38.

The square root of 12166859 is about 3488.1024927602. The cubic root of 12166859 is about 229.9991115278. Note that the first 3 decimals are identical.

It can be divided in two parts, 1216 and 6859, that multiplied together give a square (8340544 = 2888²).

The spelling of 12166859 in words is "twelve million, one hundred sixty-six thousand, eight hundred fifty-nine".