820841 has 8 divisors (see below), whose sum is σ = 945600. Its totient is φ = 697968.

The previous prime is 820837. The next prime is 820873. The reversal of 820841 is 148028.

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 820841 - 2² = 820837 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820891) 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, 650 + ... + 1436.

It is an arithmetic number, because the mean of its divisors is an integer number (118200).

2⁸²⁰⁸⁴¹ is an apocalyptic number.

It is an amenable number.

820841 is a deficient number, since it is larger than the sum of its proper divisors (124759).

820841 is a wasteful number, since it uses less digits than its factorization.

820841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 820841 is about 906.0027593777. The cubic root of 820841 is about 93.6310039863.

Adding to 820841 its reverse (148028), we get a palindrome (968869).

It can be divided in two parts, 820 and 841, that added together give a palindrome (1661).

The spelling of 820841 in words is "eight hundred twenty thousand, eight hundred forty-one".