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842111 is a prime number
BaseRepresentation
bin11001101100101111111
31120210011022
43031211333
5203421421
630014355
710105064
oct3154577
91523138
10842111
11525766
123473bb
132363ba
1417cc6b
151197ab
hexcd97f

842111 has 2 divisors, whose sum is σ = 842112. Its totient is φ = 842110.

The previous prime is 842089. The next prime is 842113. The reversal of 842111 is 111248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 842111 - 26 = 842047 is a prime.

It is a Sophie Germain prime.

Together with 842113, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p67040 and since 842111 and 67040 have the same sum of digits, it is a Honaker prime.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 842111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421055 + 421056.

It is an arithmetic number, because the mean of its divisors is an integer number (421056).

2842111 is an apocalyptic number.

842111 is a deficient number, since it is larger than the sum of its proper divisors (1).

842111 is an equidigital number, since it uses as much as digits as its factorization.

842111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64, while the sum is 17.

The square root of 842111 is about 917.6660612663. Note that the first 3 decimals coincide. The cubic root of 842111 is about 94.4328535820.

Adding to 842111 its reverse (111248), we get a palindrome (953359).

The spelling of 842111 in words is "eight hundred forty-two thousand, one hundred eleven".