420579 has 16 divisors (see below), whose sum is σ = 641440. Its totient is φ = 272160.

The previous prime is 420571. The next prime is 420593. The reversal of 420579 is 975024.

It is not a de Polignac number, because 420579 - 2³ = 420571 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 789 + ... + 1209.

It is an arithmetic number, because the mean of its divisors is an integer number (40090).

2⁴²⁰⁵⁷⁹ is an apocalyptic number.

420579 is a deficient number, since it is larger than the sum of its proper divisors (220861).

420579 is a wasteful number, since it uses less digits than its factorization.

420579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 420579 is about 648.5206241902. The cubic root of 420579 is about 74.9231212223.

It can be divided in two parts, 420 and 579, that added together give a palindrome (999).

The spelling of 420579 in words is "four hundred twenty thousand, five hundred seventy-nine".