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1000885 = 5200177
BaseRepresentation
bin11110100010110110101
31212211221211
43310112311
5224012020
633241421
711336014
oct3642665
91784854
101000885
11623a86
12403271
13290752
141c0a7b
1514b85a
hexf45b5

1000885 has 4 divisors (see below), whose sum is σ = 1201068. Its totient is φ = 800704.

The previous prime is 1000861. The next prime is 1000889. The reversal of 1000885 is 5880001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5880001 = 6738737.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 806404 = 441^2 + 898^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000885 - 215 = 968117 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000889) 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, 100084 + ... + 100093.

It is an arithmetic number, because the mean of its divisors is an integer number (300267).

21000885 is an apocalyptic number.

It is an amenable number.

1000885 is a deficient number, since it is larger than the sum of its proper divisors (200183).

1000885 is an equidigital number, since it uses as much as digits as its factorization.

1000885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200182.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 1000885 is about 1000.4424021402. The cubic root of 1000885 is about 100.0294913018.

Adding to 1000885 its reverse (5880001), we get a palindrome (6880886).

The spelling of 1000885 in words is "one million, eight hundred eighty-five", and thus it is an aban number.

Divisors: 1 5 200177 1000885