420867 has 12 divisors (see below), whose sum is σ = 615264. Its totient is φ = 277200.

The previous prime is 420859. The next prime is 420899. The reversal of 420867 is 768024.

It is not a de Polignac number, because 420867 - 2³ = 420859 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 420867.

It is not an unprimeable number, because it can be changed into a prime (420857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 678 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (51272).

2⁴²⁰⁸⁶⁷ is an apocalyptic number.

420867 is a deficient number, since it is larger than the sum of its proper divisors (194397).

420867 is a wasteful number, since it uses less digits than its factorization.

420867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 420867 is about 648.7426300159. The cubic root of 420867 is about 74.9402190291.

The spelling of 420867 in words is "four hundred twenty thousand, eight hundred sixty-seven".