420284 has 6 divisors (see below), whose sum is σ = 735504. Its totient is φ = 210140.

The previous prime is 420271. The next prime is 420293. The reversal of 420284 is 482024.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420284.

It is an unprimeable number.

420284 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 52532 + ... + 52539.

It is an arithmetic number, because the mean of its divisors is an integer number (122584).

2⁴²⁰²⁸⁴ is an apocalyptic number.

It is an amenable number.

420284 is a deficient number, since it is larger than the sum of its proper divisors (315220).

420284 is a wasteful number, since it uses less digits than its factorization.

420284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105075 (or 105073 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 420284 is about 648.2931435701. The cubic root of 420284 is about 74.9055997496.

The spelling of 420284 in words is "four hundred twenty thousand, two hundred eighty-four".