420879 has 8 divisors (see below), whose sum is σ = 564480. Its totient is φ = 278936.

The previous prime is 420859. The next prime is 420899. The reversal of 420879 is 978024.

It is an interprime number because it is at equal distance from previous prime (420859) and next prime (420899).

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

It is a cyclic number.

It is not a de Polignac number, because 420879 - 2⁹ = 420367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420809) 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, 424 + ... + 1010.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2⁴²⁰⁸⁷⁹ is an apocalyptic number.

420879 is a deficient number, since it is larger than the sum of its proper divisors (143601).

420879 is a wasteful number, since it uses less digits than its factorization.

420879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 420879 is about 648.7518786100. The cubic root of 420879 is about 74.9409312685.

The spelling of 420879 in words is "four hundred twenty thousand, eight hundred seventy-nine".