428135 has 4 divisors (see below), whose sum is σ = 513768. Its totient is φ = 342504.

The previous prime is 428093. The next prime is 428137. The reversal of 428135 is 531824.

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 428135 - 2⁸ = 427879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428135.

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 428135.

It is not an unprimeable number, because it can be changed into a prime (428137) 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, 42809 + ... + 42818.

It is an arithmetic number, because the mean of its divisors is an integer number (128442).

2⁴²⁸¹³⁵ is an apocalyptic number.

428135 is a deficient number, since it is larger than the sum of its proper divisors (85633).

428135 is an equidigital number, since it uses as much as digits as its factorization.

428135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85632.

The product of its digits is 960, while the sum is 23.

The square root of 428135 is about 654.3202579777. The cubic root of 428135 is about 75.3691430938.

Adding to 428135 its reverse (531824), we get a palindrome (959959).

The spelling of 428135 in words is "four hundred twenty-eight thousand, one hundred thirty-five".