8947561 has 8 divisors (see below), whose sum is σ = 10555904. Its totient is φ = 7421760.

The previous prime is 8947517. The next prime is 8947567. The reversal of 8947561 is 1657498.

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 8947561 - 2¹³ = 8939369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8947567) 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, 20400 + ... + 20833.

It is an arithmetic number, because the mean of its divisors is an integer number (1319488).

Almost surely, 2^8947561 is an apocalyptic number.

It is an amenable number.

8947561 is a deficient number, since it is larger than the sum of its proper divisors (1608343).

8947561 is a wasteful number, since it uses less digits than its factorization.

8947561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41271.

The product of its digits is 60480, while the sum is 40.

The square root of 8947561 is about 2991.2473986616. The cubic root of 8947561 is about 207.6036043320.

The spelling of 8947561 in words is "eight million, nine hundred forty-seven thousand, five hundred sixty-one".