8661245 has 32 divisors (see below), whose sum is σ = 12026880. Its totient is φ = 5944320.

The previous prime is 8661241. The next prime is 8661251. The reversal of 8661245 is 5421668.

It is not a de Polignac number, because 8661245 - 2² = 8661241 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661241) 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 31 ways as a sum of consecutive naturals, for example, 49979 + ... + 50151.

It is an arithmetic number, because the mean of its divisors is an integer number (375840).

Almost surely, 2^8661245 is an apocalyptic number.

8661245 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8661245 is a deficient number, since it is larger than the sum of its proper divisors (3365635).

8661245 is a wasteful number, since it uses less digits than its factorization.

8661245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245.

The product of its digits is 11520, while the sum is 32.

The square root of 8661245 is about 2942.9993204213. Note that the first 3 decimals coincide. The cubic root of 8661245 is about 205.3651631542.

The spelling of 8661245 in words is "eight million, six hundred sixty-one thousand, two hundred forty-five".