821341 has 4 divisors (see below), whose sum is σ = 836892. Its totient is φ = 805792.

The previous prime is 821333. The next prime is 821377. The reversal of 821341 is 143128.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 715716 + 105625 = 846^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 821341 - 2³ = 821333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7696 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (209223).

2⁸²¹³⁴¹ is an apocalyptic number.

It is an amenable number.

821341 is a deficient number, since it is larger than the sum of its proper divisors (15551).

821341 is a wasteful number, since it uses less digits than its factorization.

821341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15550.

The product of its digits is 192, while the sum is 19.

The square root of 821341 is about 906.2786547194. The cubic root of 821341 is about 93.6500113213.

Adding to 821341 its reverse (143128), we get a palindrome (964469).

The spelling of 821341 in words is "eight hundred twenty-one thousand, three hundred forty-one".