8738561 has 8 divisors (see below), whose sum is σ = 9964584. Its totient is φ = 7591680.

The previous prime is 8738539. The next prime is 8738567. The reversal of 8738561 is 1658378.

It can be written as a sum of positive squares in 4 ways, for example, as 625 + 8737936 = 25^2 + 2956^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8738561 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8738567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19550 + ... + 19991.

It is an arithmetic number, because the mean of its divisors is an integer number (1245573).

Almost surely, 2^8738561 is an apocalyptic number.

It is an amenable number.

8738561 is a deficient number, since it is larger than the sum of its proper divisors (1226023).

8738561 is a wasteful number, since it uses less digits than its factorization.

8738561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39571.

The product of its digits is 40320, while the sum is 38.

The square root of 8738561 is about 2956.1057152950. The cubic root of 8738561 is about 205.9744289119.

The spelling of 8738561 in words is "eight million, seven hundred thirty-eight thousand, five hundred sixty-one".