428225 has 12 divisors (see below), whose sum is σ = 607104. Its totient is φ = 293520.

The previous prime is 428221. The next prime is 428227. The reversal of 428225 is 522824.

It is not a de Polignac number, because 428225 - 2² = 428221 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 428225.

It is not an unprimeable number, because it can be changed into a prime (428221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1049 + ... + 1398.

It is an arithmetic number, because the mean of its divisors is an integer number (50592).

2⁴²⁸²²⁵ is an apocalyptic number.

It is an amenable number.

428225 is a deficient number, since it is larger than the sum of its proper divisors (178879).

428225 is a wasteful number, since it uses less digits than its factorization.

428225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464 (or 2459 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 428225 is about 654.3890280254. The cubic root of 428225 is about 75.3744239418.

The spelling of 428225 in words is "four hundred twenty-eight thousand, two hundred twenty-five".