8870561 has 4 divisors (see below), whose sum is σ = 10137792. Its totient is φ = 7603332.

The previous prime is 8870551. The next prime is 8870567. The reversal of 8870561 is 1650788.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8870561 - 2⁶ = 8870497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8870567) 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 3 ways as a sum of consecutive naturals, for example, 633605 + ... + 633618.

It is an arithmetic number, because the mean of its divisors is an integer number (2534448).

Almost surely, 2^8870561 is an apocalyptic number.

It is an amenable number.

8870561 is a deficient number, since it is larger than the sum of its proper divisors (1267231).

8870561 is a wasteful number, since it uses less digits than its factorization.

8870561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267230.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 8870561 is about 2978.3487035604. The cubic root of 8870561 is about 207.0063632357.

The spelling of 8870561 in words is "eight million, eight hundred seventy thousand, five hundred sixty-one".