834721 has 2 divisors, whose sum is σ = 834722. Its totient is φ = 834720.

The previous prime is 834709. The next prime is 834761. The reversal of 834721 is 127438.

834721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474721 + 360000 = 689^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 834721 - 2⁷ = 834593 is a prime.

It is a d-powerful number, because it can be written as 8 + 3⁸ + 7⁷ + 4⁶ + 2⁹ + 1 .

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (834761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417360 + 417361.

It is an arithmetic number, because the mean of its divisors is an integer number (417361).

2⁸³⁴⁷²¹ is an apocalyptic number.

It is an amenable number.

834721 is a deficient number, since it is larger than the sum of its proper divisors (1).

834721 is an equidigital number, since it uses as much as digits as its factorization.

834721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 834721 is about 913.6306693626. The cubic root of 834721 is about 94.1558076948.

The spelling of 834721 in words is "eight hundred thirty-four thousand, seven hundred twenty-one".