12120406 has 4 divisors (see below), whose sum is σ = 18180612. Its totient is φ = 6060202.

The previous prime is 12120403. The next prime is 12120419. The reversal of 12120406 is 60402121.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12120406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120401) 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 as a sum of consecutive naturals, namely, 3030100 + ... + 3030103.

It is an arithmetic number, because the mean of its divisors is an integer number (4545153).

Almost surely, 2^12120406 is an apocalyptic number.

12120406 is a deficient number, since it is larger than the sum of its proper divisors (6060206).

12120406 is an equidigital number, since it uses as much as digits as its factorization.

12120406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060205.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 12120406 is about 3481.4373468440. The cubic root of 12120406 is about 229.7060264354.

Adding to 12120406 its reverse (60402121), we get a palindrome (72522527).

The spelling of 12120406 in words is "twelve million, one hundred twenty thousand, four hundred six".