8772561 has 24 divisors (see below), whose sum is σ = 15335424. Its totient is φ = 4717440.

The previous prime is 8772553. The next prime is 8772563. The reversal of 8772561 is 1652778.

It is not a de Polignac number, because 8772561 - 2³ = 8772553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8772563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3025 + ... + 5166.

It is an arithmetic number, because the mean of its divisors is an integer number (638976).

Almost surely, 2^8772561 is an apocalyptic number.

It is an amenable number.

8772561 is a deficient number, since it is larger than the sum of its proper divisors (6562863).

8772561 is a wasteful number, since it uses less digits than its factorization.

8772561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8221 (or 8218 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 8772561 is about 2961.8509415566. The cubic root of 8772561 is about 206.2412183589.

The spelling of 8772561 in words is "eight million, seven hundred seventy-two thousand, five hundred sixty-one".