8661225 has 24 divisors (see below), whose sum is σ = 14945472. Its totient is φ = 4417600.

The previous prime is 8661223. The next prime is 8661239. The reversal of 8661225 is 5221668.

It is not a de Polignac number, because 8661225 - 2¹ = 8661223 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8661192 and 8661201.

It is not an unprimeable number, because it can be changed into a prime (8661223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 786 + ... + 4235.

It is an arithmetic number, because the mean of its divisors is an integer number (622728).

Almost surely, 2^8661225 is an apocalyptic number.

It is an amenable number.

8661225 is a deficient number, since it is larger than the sum of its proper divisors (6284247).

8661225 is a wasteful number, since it uses less digits than its factorization.

8661225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057 (or 5052 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 8661225 is about 2942.9959225252. The cubic root of 8661225 is about 205.3650050820.

The spelling of 8661225 in words is "eight million, six hundred sixty-one thousand, two hundred twenty-five".