12116945 has 8 divisors (see below), whose sum is σ = 14933544. Its totient is φ = 9431424.

The previous prime is 12116899. The next prime is 12116953. The reversal of 12116945 is 54961121.

It can be written as a sum of positive squares in 4 ways, for example, as 3254416 + 8862529 = 1804^2 + 2977^2 .

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 12116945 - 2¹⁰ = 12115921 is a prime.

It is a super-2 number, since 2×12116945² = 293640712266050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 32564 + ... + 32933.

It is an arithmetic number, because the mean of its divisors is an integer number (1866693).

Almost surely, 2^12116945 is an apocalyptic number.

It is an amenable number.

12116945 is a deficient number, since it is larger than the sum of its proper divisors (2816599).

12116945 is an equidigital number, since it uses as much as digits as its factorization.

12116945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65539.

The product of its digits is 2160, while the sum is 29.

The square root of 12116945 is about 3480.9402465426. The cubic root of 12116945 is about 229.6841600545.

The spelling of 12116945 in words is "twelve million, one hundred sixteen thousand, nine hundred forty-five".