420856 has 16 divisors (see below), whose sum is σ = 815040. Its totient is φ = 203520.

The previous prime is 420853. The next prime is 420857. The reversal of 420856 is 658024.

420856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 420856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601 + ... + 1096.

It is an arithmetic number, because the mean of its divisors is an integer number (50940).

2⁴²⁰⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

420856 is a deficient number, since it is larger than the sum of its proper divisors (394184).

420856 is a wasteful number, since it uses less digits than its factorization.

420856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 420856 is about 648.7341520222. The cubic root of 420856 is about 74.9395661312.

The spelling of 420856 in words is "four hundred twenty thousand, eight hundred fifty-six".