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1000205 = 5200041
BaseRepresentation
bin11110100001100001101
31212211000122
43310030031
5224001310
633234325
711334023
oct3641415
91784018
101000205
11623518
124029a5
1329034b
141c0713
1514b555
hexf430d

1000205 has 4 divisors (see below), whose sum is σ = 1200252. Its totient is φ = 800160.

The previous prime is 1000199. The next prime is 1000211. The reversal of 1000205 is 5020001.

1000205 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 is an interprime number because it is at equal distance from previous prime (1000199) and next prime (1000211).

It can be written as a sum of positive squares in 2 ways, for example, as 586756 + 413449 = 766^2 + 643^2 .

It is not a de Polignac number, because 1000205 - 210 = 999181 is a prime.

It is a Duffinian number.

1000205 is a modest number, since divided by 205 gives 10 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1000192 and 1000201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100016 + ... + 100025.

It is an arithmetic number, because the mean of its divisors is an integer number (300063).

21000205 is an apocalyptic number.

It is an amenable number.

1000205 is a deficient number, since it is larger than the sum of its proper divisors (200047).

1000205 is an equidigital number, since it uses as much as digits as its factorization.

1000205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200046.

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 1000205 is about 1000.1024947474. The cubic root of 1000205 is about 100.0068328664.

Adding to 1000205 its reverse (5020001), we get a palindrome (6020206).

The spelling of 1000205 in words is "one million, two hundred five", and thus it is an aban number.

Divisors: 1 5 200041 1000205