12161612 has 12 divisors (see below), whose sum is σ = 21494256. Its totient is φ = 6020400.

The previous prime is 12161599. The next prime is 12161623. The reversal of 12161612 is 21616121.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14648 + ... + 15455.

It is an arithmetic number, because the mean of its divisors is an integer number (1791188).

Almost surely, 2^12161612 is an apocalyptic number.

It is an amenable number.

12161612 is a deficient number, since it is larger than the sum of its proper divisors (9332644).

12161612 is a wasteful number, since it uses less digits than its factorization.

12161612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30208 (or 30206 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

The square root of 12161612 is about 3487.3502835247. The cubic root of 12161612 is about 229.9660441365.

Adding to 12161612 its reverse (21616121), we get a palindrome (33777733).

The spelling of 12161612 in words is "twelve million, one hundred sixty-one thousand, six hundred twelve".