8129225 has 12 divisors (see below), whose sum is σ = 10856076. Its totient is φ = 6002880.

The previous prime is 8129221. The next prime is 8129227. The reversal of 8129225 is 5229218.

It can be written as a sum of positive squares in 6 ways, for example, as 1024 + 8128201 = 32^2 + 2851^2 .

It is not a de Polignac number, because 8129225 - 2² = 8129221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8129221) 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 11 ways as a sum of consecutive naturals, for example, 12182 + ... + 12831.

It is an arithmetic number, because the mean of its divisors is an integer number (904673).

Almost surely, 2^8129225 is an apocalyptic number.

It is an amenable number.

8129225 is a deficient number, since it is larger than the sum of its proper divisors (2726851).

8129225 is a wasteful number, since it uses less digits than its factorization.

8129225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25036 (or 25031 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 8129225 is about 2851.1795804544. The cubic root of 8129225 is about 201.0711281811.

The spelling of 8129225 in words is "eight million, one hundred twenty-nine thousand, two hundred twenty-five".