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BaseRepresentation
bin11110100011000011011
31212212002121
43310120123
5224012422
633242111
711336221
oct3643033
91785077
101000987
11624069
12403337
13290800
141c0b11
1514b8c7
hexf461b

1000987 has 6 divisors (see below), whose sum is σ = 1084092. Its totient is φ = 923832.

The previous prime is 1000981. The next prime is 1000999. The reversal of 1000987 is 7890001.

It is not a de Polignac number, because 1000987 - 27 = 1000859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2793 + ... + 3130.

It is an arithmetic number, because the mean of its divisors is an integer number (180682).

21000987 is an apocalyptic number.

1000987 is a deficient number, since it is larger than the sum of its proper divisors (83105).

1000987 is an equidigital number, since it uses as much as digits as its factorization.

1000987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5949 (or 5936 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 1000987 is about 1000.4933782889. The cubic root of 1000987 is about 100.0328891818.

Adding to 1000987 its reverse (7890001), we get a palindrome (8890988).

The spelling of 1000987 in words is "one million, nine hundred eighty-seven", and thus it is an aban number.

Divisors: 1 13 169 5923 76999 1000987