420686 has 16 divisors (see below), whose sum is σ = 729600. Its totient is φ = 178200.

The previous prime is 420683. The next prime is 420691. The reversal of 420686 is 686024.

420686 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420683) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2015 + ... + 2213.

It is an arithmetic number, because the mean of its divisors is an integer number (45600).

2⁴²⁰⁶⁸⁶ is an apocalyptic number.

420686 is a deficient number, since it is larger than the sum of its proper divisors (308914).

420686 is a wasteful number, since it uses less digits than its factorization.

420686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 420686 is about 648.6031143928. The cubic root of 420686 is about 74.9294744435.

The spelling of 420686 in words is "four hundred twenty thousand, six hundred eighty-six".