8634561 has 8 divisors (see below), whose sum is σ = 12398400. Its totient is φ = 5313552.

The previous prime is 8634557. The next prime is 8634581. The reversal of 8634561 is 1654368.

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

It is not a de Polignac number, because 8634561 - 2² = 8634557 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

8634561 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8634551) 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, 110661 + ... + 110738.

It is an arithmetic number, because the mean of its divisors is an integer number (1549800).

Almost surely, 2^8634561 is an apocalyptic number.

It is an amenable number.

8634561 is a deficient number, since it is larger than the sum of its proper divisors (3763839).

8634561 is a wasteful number, since it uses less digits than its factorization.

8634561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221415.

The product of its digits is 17280, while the sum is 33.

The square root of 8634561 is about 2938.4623530003. The cubic root of 8634561 is about 205.1540464185.

The spelling of 8634561 in words is "eight million, six hundred thirty-four thousand, five hundred sixty-one".