428145 has 32 divisors (see below), whose sum is σ = 767232. Its totient is φ = 202752.

The previous prime is 428143. The next prime is 428147. The reversal of 428145 is 541824.

It is an interprime number because it is at equal distance from previous prime (428143) and next prime (428147).

It is not a de Polignac number, because 428145 - 2¹ = 428143 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428145.

It is not an unprimeable number, because it can be changed into a prime (428143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5829 + ... + 5901.

It is an arithmetic number, because the mean of its divisors is an integer number (23976).

2⁴²⁸¹⁴⁵ is an apocalyptic number.

It is an amenable number.

428145 is a deficient number, since it is larger than the sum of its proper divisors (339087).

428145 is a wasteful number, since it uses less digits than its factorization.

428145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121.

The product of its digits is 1280, while the sum is 24.

The square root of 428145 is about 654.3278994510. The cubic root of 428145 is about 75.3697298912.

Adding to 428145 its reverse (541824), we get a palindrome (969969).

The spelling of 428145 in words is "four hundred twenty-eight thousand, one hundred forty-five".