850121 has 2 divisors, whose sum is σ = 850122. Its totient is φ = 850120.

The previous prime is 850093. The next prime is 850133. The reversal of 850121 is 121058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846400 + 3721 = 920^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 850121 - 2¹⁰ = 849097 is a prime.

It is a Chen prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 850121.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 850121.

It is not a weakly prime, because it can be changed into another prime (850181) 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, 425060 + 425061.

It is an arithmetic number, because the mean of its divisors is an integer number (425061).

2⁸⁵⁰¹²¹ is an apocalyptic number.

It is an amenable number.

850121 is a deficient number, since it is larger than the sum of its proper divisors (1).

850121 is an equidigital number, since it uses as much as digits as its factorization.

850121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 850121 is about 922.0200648576. The cubic root of 850121 is about 94.7313183860.

Adding to 850121 its reverse (121058), we get a palindrome (971179).

The spelling of 850121 in words is "eight hundred fifty thousand, one hundred twenty-one".