12166539 has 32 divisors (see below), whose sum is σ = 20889600. Its totient is φ = 6112800.

The previous prime is 12166537. The next prime is 12166547. The reversal of 12166539 is 93566121.

It is a happy number.

It is not a de Polignac number, because 12166539 - 2¹ = 12166537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12166537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6312 + ... + 8010.

It is an arithmetic number, because the mean of its divisors is an integer number (652800).

Almost surely, 2^12166539 is an apocalyptic number.

12166539 is a deficient number, since it is larger than the sum of its proper divisors (8723061).

12166539 is a wasteful number, since it uses less digits than its factorization.

12166539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751.

The product of its digits is 9720, while the sum is 33.

The square root of 12166539 is about 3488.0566222468. The cubic root of 12166539 is about 229.9970951114.

The spelling of 12166539 in words is "twelve million, one hundred sixty-six thousand, five hundred thirty-nine".