821141 has 4 divisors (see below), whose sum is σ = 843372. Its totient is φ = 798912.

The previous prime is 821131. The next prime is 821143. The reversal of 821141 is 141128.

821141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 758641 + 62500 = 871^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 821141 - 2¹⁰ = 820117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821143) 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, 11060 + ... + 11133.

It is an arithmetic number, because the mean of its divisors is an integer number (210843).

2⁸²¹¹⁴¹ is an apocalyptic number.

It is an amenable number.

821141 is a deficient number, since it is larger than the sum of its proper divisors (22231).

821141 is a wasteful number, since it uses less digits than its factorization.

821141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22230.

The product of its digits is 64, while the sum is 17.

The square root of 821141 is about 906.1683066627. The cubic root of 821141 is about 93.6424093132.

Adding to 821141 its reverse (141128), we get a palindrome (962269).

The spelling of 821141 in words is "eight hundred twenty-one thousand, one hundred forty-one".