428122 has 16 divisors (see below), whose sum is σ = 689472. Its totient is φ = 198880.

The previous prime is 428093. The next prime is 428137. The reversal of 428122 is 221824.

428122 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 428122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1773 + ... + 1999.

It is an arithmetic number, because the mean of its divisors is an integer number (43092).

2⁴²⁸¹²² is an apocalyptic number.

428122 is a deficient number, since it is larger than the sum of its proper divisors (261350).

428122 is a wasteful number, since it uses less digits than its factorization.

428122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293.

The product of its digits is 256, while the sum is 19.

The square root of 428122 is about 654.3103239289. The cubic root of 428122 is about 75.3683802435.

Multiplying 428122 by its sum of digits (19), we get a palindrome (8134318).

Adding to 428122 its reverse (221824), we get a palindrome (649946).

The spelling of 428122 in words is "four hundred twenty-eight thousand, one hundred twenty-two".