12420686 has 8 divisors (see below), whose sum is σ = 18646320. Its totient is φ = 6205248.

The previous prime is 12420673. The next prime is 12420689. The reversal of 12420686 is 68602421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420689) 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 in 3 ways as a sum of consecutive naturals, for example, 2495 + ... + 5573.

It is an arithmetic number, because the mean of its divisors is an integer number (2330790).

Almost surely, 2^12420686 is an apocalyptic number.

12420686 is a deficient number, since it is larger than the sum of its proper divisors (6225634).

12420686 is a wasteful number, since it uses less digits than its factorization.

12420686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 12420686 is about 3524.2993629940. The cubic root of 12420686 is about 231.5875425203.

The spelling of 12420686 in words is "twelve million, four hundred twenty thousand, six hundred eighty-six".