1000905 has 16 divisors (see below), whose sum is σ = 1632960. Its totient is φ = 523328.

The previous prime is 1000889. The next prime is 1000907. The reversal of 1000905 is 5090001.

It is a cyclic number.

It is not a de Polignac number, because 1000905 - 2⁴ = 1000889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1000907) 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 15 ways as a sum of consecutive naturals, for example, 166 + ... + 1424.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2^1000905 is an apocalyptic number.

1000905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1000905 is a deficient number, since it is larger than the sum of its proper divisors (632055).

1000905 is a wasteful number, since it uses less digits than its factorization.

1000905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 45, while the sum is 15.

The square root of 1000905 is about 1000.4523976682. The cubic root of 1000905 is about 100.0301575710.

Adding to 1000905 its reverse (5090001), we get a palindrome (6090906).

The spelling of 1000905 in words is "one million, nine hundred five", and thus it is an aban number.