12166917 has 32 divisors (see below), whose sum is σ = 19844352. Its totient is φ = 6472704.

The previous prime is 12166909. The next prime is 12166919. The reversal of 12166917 is 71966121.

12166917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12166917 - 2³ = 12166909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61663 + ... + 61859.

It is an arithmetic number, because the mean of its divisors is an integer number (620136).

Almost surely, 2^12166917 is an apocalyptic number.

12166917 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12166917 is a deficient number, since it is larger than the sum of its proper divisors (7677435).

12166917 is a wasteful number, since it uses less digits than its factorization.

12166917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397.

The product of its digits is 4536, while the sum is 33.

The square root of 12166917 is about 3488.1108067262. The cubic root of 12166917 is about 229.9994769994. Note that the first 3 decimals are identical.

The spelling of 12166917 in words is "twelve million, one hundred sixty-six thousand, nine hundred seventeen".