12016681 has 8 divisors (see below), whose sum is σ = 12188160. Its totient is φ = 11846688.

The previous prime is 12016663. The next prime is 12016687. The reversal of 12016681 is 18661021.

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

It is a cyclic number.

It is not a de Polignac number, because 12016681 - 2¹¹ = 12014633 is a prime.

It is a super-2 number, since 2×12016681² = 288801244511522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12016687) 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 7 ways as a sum of consecutive naturals, for example, 32560 + ... + 32926.

It is an arithmetic number, because the mean of its divisors is an integer number (1523520).

Almost surely, 2^12016681 is an apocalyptic number.

It is an amenable number.

12016681 is a deficient number, since it is larger than the sum of its proper divisors (171479).

12016681 is a wasteful number, since it uses less digits than its factorization.

12016681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12016681 is about 3466.5084739547. The cubic root of 12016681 is about 229.0488826064.

The spelling of 12016681 in words is "twelve million, sixteen thousand, six hundred eighty-one".