841221 has 12 divisors (see below), whose sum is σ = 1225120. Its totient is φ = 556200.

The previous prime is 841219. The next prime is 841223. The reversal of 841221 is 122148.

It is an interprime number because it is at equal distance from previous prime (841219) and next prime (841223).

It is not a de Polignac number, because 841221 - 2¹ = 841219 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 841194 and 841203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (841223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1050 + ... + 1668.

2⁸⁴¹²²¹ is an apocalyptic number.

It is an amenable number.

841221 is a deficient number, since it is larger than the sum of its proper divisors (383899).

841221 is a wasteful number, since it uses less digits than its factorization.

841221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 773 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 841221 is about 917.1810072172. The cubic root of 841221 is about 94.3995741746.

Adding to 841221 its reverse (122148), we get a palindrome (963369).

The spelling of 841221 in words is "eight hundred forty-one thousand, two hundred twenty-one".