420079 has 4 divisors (see below), whose sum is σ = 458280. Its totient is φ = 381880.

The previous prime is 420073. The next prime is 420097. The reversal of 420079 is 970024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420079 - 2⁵ = 420047 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19084 + ... + 19105.

It is an arithmetic number, because the mean of its divisors is an integer number (114570).

2⁴²⁰⁰⁷⁹ is an apocalyptic number.

420079 is a deficient number, since it is larger than the sum of its proper divisors (38201).

420079 is a wasteful number, since it uses less digits than its factorization.

420079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38200.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 420079 is about 648.1350167982. The cubic root of 420079 is about 74.8934189819.

Subtracting 420079 from its reverse (970024), we obtain a palindrome (549945).

The spelling of 420079 in words is "four hundred twenty thousand, seventy-nine".