8424225 has 18 divisors (see below), whose sum is σ = 15089126. Its totient is φ = 4492800.

The previous prime is 8424211. The next prime is 8424287. The reversal of 8424225 is 5224248.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 589824 + 7834401 = 768^2 + 2799^2 .

It is not a de Polignac number, because 8424225 - 2⁴ = 8424209 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 18496 + ... + 18945.

Almost surely, 2^8424225 is an apocalyptic number.

It is an amenable number.

8424225 is a deficient number, since it is larger than the sum of its proper divisors (6664901).

8424225 is a wasteful number, since it uses less digits than its factorization.

8424225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37457 (or 37449 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 8424225 is about 2902.4515499832. The cubic root of 8424225 is about 203.4744981093.

It can be divided in two parts, 8424 and 225, that added together give a square (8649 = 93²).

The spelling of 8424225 in words is "eight million, four hundred twenty-four thousand, two hundred twenty-five".