8447561 has 8 divisors (see below), whose sum is σ = 8723040. Its totient is φ = 8176608.

The previous prime is 8447519. The next prime is 8447573. The reversal of 8447561 is 1657448.

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

It is a cyclic number.

It is not a de Polignac number, because 8447561 - 2²² = 4253257 is a prime.

It is a super-2 number, since 2×8447561² = 142722573697442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8447501) 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, 2885 + ... + 5021.

It is an arithmetic number, because the mean of its divisors is an integer number (1090380).

Almost surely, 2^8447561 is an apocalyptic number.

It is an amenable number.

8447561 is a deficient number, since it is larger than the sum of its proper divisors (275479).

8447561 is a wasteful number, since it uses less digits than its factorization.

8447561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263.

The product of its digits is 26880, while the sum is 35.

The square root of 8447561 is about 2906.4688197192. The cubic root of 8447561 is about 203.6622068979.

The spelling of 8447561 in words is "eight million, four hundred forty-seven thousand, five hundred sixty-one".