842291 has 2 divisors, whose sum is σ = 842292. Its totient is φ = 842290.

The previous prime is 842279. The next prime is 842293. The reversal of 842291 is 192248.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842291 is a prime.

Together with 842293, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 842291.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842291.

It is not a weakly prime, because it can be changed into another prime (842293) 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, 421145 + 421146.

It is an arithmetic number, because the mean of its divisors is an integer number (421146).

2⁸⁴²²⁹¹ is an apocalyptic number.

842291 is a deficient number, since it is larger than the sum of its proper divisors (1).

842291 is an equidigital number, since it uses as much as digits as its factorization.

842291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

The square root of 842291 is about 917.7641309182. The cubic root of 842291 is about 94.4395813977.

The spelling of 842291 in words is "eight hundred forty-two thousand, two hundred ninety-one".