12017864 has 8 divisors (see below), whose sum is σ = 22533510. Its totient is φ = 6008928.

The previous prime is 12017843. The next prime is 12017867. The reversal of 12017864 is 46871021.

It can be written as a sum of positive squares in only one way, i.e., 9972964 + 2044900 = 3158^2 + 1430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12017867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 751109 + ... + 751124.

Almost surely, 2^12017864 is an apocalyptic number.

It is an amenable number.

12017864 is a deficient number, since it is larger than the sum of its proper divisors (10515646).

12017864 is a wasteful number, since it uses less digits than its factorization.

12017864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502239 (or 1502235 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 12017864 is about 3466.6791025418. The cubic root of 12017864 is about 229.0563987122.

Adding to 12017864 its reverse (46871021), we get a palindrome (58888885).

The spelling of 12017864 in words is "twelve million, seventeen thousand, eight hundred sixty-four".