420279 has 8 divisors (see below), whose sum is σ = 584832. Its totient is φ = 267960.

The previous prime is 420271. The next prime is 420293. The reversal of 420279 is 972024.

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

It is not a de Polignac number, because 420279 - 2³ = 420271 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2977 + ... + 3114.

It is an arithmetic number, because the mean of its divisors is an integer number (73104).

2⁴²⁰²⁷⁹ is an apocalyptic number.

420279 is a deficient number, since it is larger than the sum of its proper divisors (164553).

420279 is a wasteful number, since it uses less digits than its factorization.

420279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 420279 is about 648.2892872784. The cubic root of 420279 is about 74.9053027048.

The spelling of 420279 in words is "four hundred twenty thousand, two hundred seventy-nine".