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1000285 = 511131399
BaseRepresentation
bin11110100001101011101
31212211010121
43310031131
5224002120
633234541
711334166
oct3641535
91784117
101000285
11623590
12402a51
132903b0
141c076d
1514b5aa
hexf435d

1000285 has 16 divisors (see below), whose sum is σ = 1411200. Its totient is φ = 671040.

The previous prime is 1000273. The next prime is 1000289. The reversal of 1000285 is 5820001.

Adding to 1000285 its reverse (5820001), we get a palindrome (6820286).

It is a happy number.

It is not a de Polignac number, because 1000285 - 25 = 1000253 is a prime.

1000285 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000289) 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, 16 + ... + 1414.

It is an arithmetic number, because the mean of its divisors is an integer number (88200).

21000285 is an apocalyptic number.

It is an amenable number.

1000285 is a deficient number, since it is larger than the sum of its proper divisors (410915).

1000285 is a wasteful number, since it uses less digits than its factorization.

1000285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1000285 is about 1000.1424898483. The cubic root of 1000285 is about 100.0094990976.

The spelling of 1000285 in words is "one million, two hundred eighty-five", and thus it is an aban number.

Divisors: 1 5 11 13 55 65 143 715 1399 6995 15389 18187 76945 90935 200057 1000285