8649225 has 36 divisors (see below), whose sum is σ = 16689036. Its totient is φ = 4256640.

The previous prime is 8649211. The next prime is 8649227. The reversal of 8649225 is 5229468.

It is a happy number.

8649225 is a `hidden beast` number, since 8 + 649 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 2039184 + 6610041 = 1428^2 + 2571^2 .

It is not a de Polignac number, because 8649225 - 2¹⁵ = 8616457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8649225.

It is not an unprimeable number, because it can be changed into a prime (8649227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1447 + ... + 4403.

Almost surely, 2^8649225 is an apocalyptic number.

It is an amenable number.

8649225 is a deficient number, since it is larger than the sum of its proper divisors (8039811).

8649225 is a wasteful number, since it uses less digits than its factorization.

8649225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986 (or 2978 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 8649225 is about 2940.9564770666. The cubic root of 8649225 is about 205.2701178477.

It can be divided in two parts, 8649 and 225, that multiplied together give a square (1946025 = 1395²).

The spelling of 8649225 in words is "eight million, six hundred forty-nine thousand, two hundred twenty-five".