8601220 has 12 divisors (see below), whose sum is σ = 18062604. Its totient is φ = 3440480.

The previous prime is 8601209. The next prime is 8601233. The reversal of 8601220 is 221068.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1557504 + 7043716 = 1248^2 + 2654^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215011 + ... + 215050.

It is an arithmetic number, because the mean of its divisors is an integer number (1505217).

Almost surely, 2^8601220 is an apocalyptic number.

It is an amenable number.

8601220 is an abundant number, since it is smaller than the sum of its proper divisors (9461384).

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

8601220 is a wasteful number, since it uses less digits than its factorization.

8601220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430070 (or 430068 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 8601220 is about 2932.7836606201. The cubic root of 8601220 is about 204.8896491160.

Adding to 8601220 its reverse (221068), we get a palindrome (8822288).

It can be divided in two parts, 860 and 1220, that added together give a triangular number (2080 = T₆₄).

The spelling of 8601220 in words is "eight million, six hundred one thousand, two hundred twenty".