428042 has 4 divisors (see below), whose sum is σ = 642066. Its totient is φ = 214020.

The previous prime is 428041. The next prime is 428047. The reversal of 428042 is 240824.

428042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 410881 + 17161 = 641^2 + 131^2 .

It is not an unprimeable number, because it can be changed into a prime (428041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107009 + ... + 107012.

2⁴²⁸⁰⁴² is an apocalyptic number.

428042 is a deficient number, since it is larger than the sum of its proper divisors (214024).

428042 is a wasteful number, since it uses less digits than its factorization.

428042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214023.

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

The square root of 428042 is about 654.2491880010. The cubic root of 428042 is about 75.3636854399.

Adding to 428042 its reverse (240824), we get a palindrome (668866).

The spelling of 428042 in words is "four hundred twenty-eight thousand, forty-two".