12017943 has 16 divisors (see below), whose sum is σ = 20348160. Its totient is φ = 6867288.

The previous prime is 12017921. The next prime is 12017953. The reversal of 12017943 is 34971021.

It is not a de Polignac number, because 12017943 - 2¹² = 12013847 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12017903) 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 15 ways as a sum of consecutive naturals, for example, 31605 + ... + 31982.

It is an arithmetic number, because the mean of its divisors is an integer number (1271760).

Almost surely, 2^12017943 is an apocalyptic number.

12017943 is a deficient number, since it is larger than the sum of its proper divisors (8330217).

12017943 is an equidigital number, since it uses as much as digits as its factorization.

12017943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63603 (or 63597 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 12017943 is about 3466.6904967130. The cubic root of 12017943 is about 229.0569006155.

Adding to 12017943 its reverse (34971021), we get a palindrome (46988964).

The spelling of 12017943 in words is "twelve million, seventeen thousand, nine hundred forty-three".