850001 has 4 divisors (see below), whose sum is σ = 873012. Its totient is φ = 826992.

The previous prime is 849997. The next prime is 850009. The reversal of 850001 is 100058.

850001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 638401 + 211600 = 799^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 850001 - 2² = 849997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (850009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11450 + ... + 11523.

It is an arithmetic number, because the mean of its divisors is an integer number (218253).

2⁸⁵⁰⁰⁰¹ is an apocalyptic number.

It is an amenable number.

850001 is a deficient number, since it is larger than the sum of its proper divisors (23011).

850001 is a wasteful number, since it uses less digits than its factorization.

850001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23010.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 850001 is about 921.9549880553. The cubic root of 850001 is about 94.7268608664.

Adding to 850001 its reverse (100058), we get a palindrome (950059).

The spelling of 850001 in words is "eight hundred fifty thousand, one".