12120605 has 8 divisors (see below), whose sum is σ = 16622592. Its totient is φ = 8311248.

The previous prime is 12120599. The next prime is 12120611. The reversal of 12120605 is 50602121.

12120605 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12120599) and next prime (12120611).

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 12120605 - 2²⁰ = 11072029 is a prime.

It is a congruent 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, 173117 + ... + 173186.

It is an arithmetic number, because the mean of its divisors is an integer number (2077824).

Almost surely, 2^12120605 is an apocalyptic number.

It is an amenable number.

12120605 is a deficient number, since it is larger than the sum of its proper divisors (4501987).

12120605 is an equidigital number, since it uses as much as digits as its factorization.

12120605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346315.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 12120605 is about 3481.4659268762. The cubic root of 12120605 is about 229.7072835783.

Adding to 12120605 its reverse (50602121), we get a palindrome (62722726).

The spelling of 12120605 in words is "twelve million, one hundred twenty thousand, six hundred five".