12420706 has 4 divisors (see below), whose sum is σ = 18631062. Its totient is φ = 6210352.

The previous prime is 12420703. The next prime is 12420719. The reversal of 12420706 is 60702421.

12420706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 6295081 + 6125625 = 2509^2 + 2475^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12420703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3105175 + ... + 3105178.

Almost surely, 2^12420706 is an apocalyptic number.

12420706 is a deficient number, since it is larger than the sum of its proper divisors (6210356).

12420706 is an equidigital number, since it uses as much as digits as its factorization.

12420706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210355.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 12420706 is about 3524.3022004363. The cubic root of 12420706 is about 231.5876668223.

The spelling of 12420706 in words is "twelve million, four hundred twenty thousand, seven hundred six".