12111985 has 8 divisors (see below), whose sum is σ = 14556096. Its totient is φ = 9675120.

The previous prime is 12111929. The next prime is 12111989. The reversal of 12111985 is 58911121.

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

It is not a de Polignac number, because 12111985 - 2⁷ = 12111857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111989) 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 in 7 ways as a sum of consecutive naturals, for example, 3070 + ... + 5800.

It is an arithmetic number, because the mean of its divisors is an integer number (1819512).

Almost surely, 2^12111985 is an apocalyptic number.

It is an amenable number.

12111985 is a deficient number, since it is larger than the sum of its proper divisors (2444111).

12111985 is an equidigital number, since it uses as much as digits as its factorization.

12111985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623.

The product of its digits is 720, while the sum is 28.

The square root of 12111985 is about 3480.2277224343. The cubic root of 12111985 is about 229.6528158250.

The spelling of 12111985 in words is "twelve million, one hundred eleven thousand, nine hundred eighty-five".