1000005 has 16 divisors (see below), whose sum is σ = 1613760.
Its totient is φ = 528768.
The previous prime is 1000003. The next prime is 1000033. The reversal of 1000005 is 5000001.
It is not a de Polignac number, because 1000005 - 21 = 1000003 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 999957 and 1000002.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1000003) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2241 + ... + 2649.
It is an arithmetic number, because the mean of its divisors is an integer number (100860).
21000005 is an apocalyptic number.
1000005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
It is an amenable number.
1000005 is a deficient number, since it is larger than the sum of its proper divisors (613755).
1000005 is a wasteful number, since it uses less digits than its factorization.
1000005 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 580.
The product of its (nonzero) digits is 5, while the sum is 6.
The square root of 1000005 is about 1000.0024999969.
The cubic root of 1000005 is about 100.0001666664.
Note that the first 3 decimals are identical.
The spelling of 1000005 in words is "one million, five", and is thus an aban number and an uban number.