847561 has 8 divisors (see below), whose sum is σ = 995904. Its totient is φ = 711120.

The previous prime is 847549. The next prime is 847577. The reversal of 847561 is 165748.

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 847561 - 2¹³ = 839369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (847531) 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, 2821 + ... + 3106.

It is an arithmetic number, because the mean of its divisors is an integer number (124488).

2⁸⁴⁷⁵⁶¹ is an apocalyptic number.

It is an amenable number.

847561 is a deficient number, since it is larger than the sum of its proper divisors (148343).

847561 is a wasteful number, since it uses less digits than its factorization.

847561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5951.

The product of its digits is 6720, while the sum is 31.

The square root of 847561 is about 920.6307620322. The cubic root of 847561 is about 94.6361334999.

The spelling of 847561 in words is "eight hundred forty-seven thousand, five hundred sixty-one".