847641 has 8 divisors (see below), whose sum is σ = 1169280. Its totient is φ = 545552.

The previous prime is 847621. The next prime is 847657. The reversal of 847641 is 146748.

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 847641 - 2⁶ = 847577 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 847599 and 847608.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 847641.

It is not an unprimeable number, because it can be changed into a prime (847601) 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, 4785 + ... + 4958.

It is an arithmetic number, because the mean of its divisors is an integer number (146160).

2⁸⁴⁷⁶⁴¹ is an apocalyptic number.

It is an amenable number.

847641 is a deficient number, since it is larger than the sum of its proper divisors (321639).

847641 is a wasteful number, since it uses less digits than its factorization.

847641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9775.

The product of its digits is 5376, while the sum is 30.

The square root of 847641 is about 920.6742094791. The cubic root of 847641 is about 94.6391109267.

The spelling of 847641 in words is "eight hundred forty-seven thousand, six hundred forty-one".