840611 has 2 divisors, whose sum is σ = 840612. Its totient is φ = 840610.

The previous prime is 840601. The next prime is 840643. The reversal of 840611 is 116048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 840611 - 2⁶ = 840547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (840601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420305 + 420306.

It is an arithmetic number, because the mean of its divisors is an integer number (420306).

2⁸⁴⁰⁶¹¹ is an apocalyptic number.

840611 is a deficient number, since it is larger than the sum of its proper divisors (1).

840611 is an equidigital number, since it uses as much as digits as its factorization.

840611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 840611 is about 916.8484062265. The cubic root of 840611 is about 94.3767511334.

Adding to 840611 its reverse (116048), we get a palindrome (956659).

The spelling of 840611 in words is "eight hundred forty thousand, six hundred eleven".