4228225 has 6 divisors (see below), whose sum is σ = 5243030. Its totient is φ = 3382560.

The previous prime is 4228199. The next prime is 4228243. The reversal of 4228225 is 5228224.

4228225 = T₃₈₆ + T₃₈₇ + ... + T₄₃₅.

It can be written as a sum of positive squares in 3 ways, for example, as 1089 + 4227136 = 33^2 + 2056^2 .

It is not a de Polignac number, because 4228225 - 2⁷ = 4228097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 169129 = 4228225 / (4 + 2 + 2 + 8 + 2 + 2 + 5).

It is a d-powerful number, because it can be written as 4³ + 2⁵ + 2¹⁰ + 8 + 2¹⁵ + 2²² + 5² .

It is a self number, because there is not a number n which added to its sum of digits gives 4228225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84540 + ... + 84589.

Almost surely, 2^4228225 is an apocalyptic number.

It is an amenable number.

4228225 is a deficient number, since it is larger than the sum of its proper divisors (1014805).

4228225 is a wasteful number, since it uses less digits than its factorization.

4228225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169139 (or 169134 counting only the distinct ones).

The product of its digits is 2560, while the sum is 25.

The square root of 4228225 is about 2056.2648175758. The cubic root of 4228225 is about 161.7034788220.

Subtracting 4228225 from its reverse (5228224), we obtain a palindrome (999999).

The spelling of 4228225 in words is "four million, two hundred twenty-eight thousand, two hundred twenty-five".