8661250 has 60 divisors (see below), whose sum is σ = 18008298. Its totient is φ = 3120000.

The previous prime is 8661241. The next prime is 8661251. The reversal of 8661250 is 521668.

It is a Cunningham number, because it is equal to 2943²+1.

It can be written as a sum of positive squares in 15 ways, for example, as 8242641 + 418609 = 2871^2 + 647^2 .

It is not an unprimeable number, because it can be changed into a prime (8661251) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 211230 + ... + 211270.

Almost surely, 2^8661250 is an apocalyptic number.

8661250 is an abundant number, since it is smaller than the sum of its proper divisors (9347048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8661250 is a wasteful number, since it uses less digits than its factorization.

8661250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 8661250 is about 2943.0001698947. Note that the first 3 decimals coincide. The cubic root of 8661250 is about 205.3652026722.

It can be divided in two parts, 8661 and 250, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 8661250 in words is "eight million, six hundred sixty-one thousand, two hundred fifty".