841921 has 2 divisors, whose sum is σ = 841922. Its totient is φ = 841920.

The previous prime is 841913. The next prime is 841927. The reversal of 841921 is 129148.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 505521 + 336400 = 711^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 841921 - 2³ = 841913 is a prime.

841921 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (841927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420960 + 420961.

It is an arithmetic number, because the mean of its divisors is an integer number (420961).

2⁸⁴¹⁹²¹ is an apocalyptic number.

It is an amenable number.

841921 is a deficient number, since it is larger than the sum of its proper divisors (1).

841921 is an equidigital number, since it uses as much as digits as its factorization.

841921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 25.

The square root of 841921 is about 917.5625319290. The cubic root of 841921 is about 94.4257509587.

The spelling of 841921 in words is "eight hundred forty-one thousand, nine hundred twenty-one".