1000859 has 2 divisors, whose sum is σ = 1000860.
Its totient is φ = 1000858.
The previous prime is 1000849. The next prime is 1000861. The reversal of 1000859 is 9580001.
It is a strong prime.
It is an emirp because it is prime and its reverse (9580001) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1000859 - 212 = 996763 is a prime.
Together with 1000861, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (1000829) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500429 + 500430.
It is an arithmetic number, because the mean of its divisors is an integer number (500430).
21000859 is an apocalyptic number.
1000859 is a deficient number, since it is larger than the sum of its proper divisors (1).
1000859 is an equidigital number, since it uses as much as digits as its factorization.
1000859 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 360, while the sum is 23.
The square root of 1000859 is about 1000.4294078045.
The cubic root of 1000859 is about 100.0286251386.
The spelling of 1000859 in words is "one million, eight hundred fifty-nine", and thus it is an aban number.