420860 has 24 divisors (see below), whose sum is σ = 964656. Its totient is φ = 152960.

The previous prime is 420859. The next prime is 420899. The reversal of 420860 is 68024.

420860 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420860.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 737 + ... + 1176.

It is an arithmetic number, because the mean of its divisors is an integer number (40194).

2⁴²⁰⁸⁶⁰ is an apocalyptic number.

It is an amenable number.

420860 is an abundant number, since it is smaller than the sum of its proper divisors (543796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420860 is a wasteful number, since it uses less digits than its factorization.

420860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933 (or 1931 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 420860 is about 648.7372349419. The cubic root of 420860 is about 74.9398035499.

Adding to 420860 its reverse (68024), we get a palindrome (488884).

Subtracting from 420860 its reverse (68024), we obtain a square (352836 = 594²).

The spelling of 420860 in words is "four hundred twenty thousand, eight hundred sixty".