1006605 has 12 divisors (see below), whose sum is σ = 1744860. Its totient is φ = 536832.

The previous prime is 1006589. The next prime is 1006609. The reversal of 1006605 is 5066001.

1006605 is a `hidden beast` number, since 1 + 0 + 0 + 660 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 412164 + 594441 = 642^2 + 771^2 .

It is not a de Polignac number, because 1006605 - 2⁴ = 1006589 is a prime.

1006605 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006609) 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 11 ways as a sum of consecutive naturals, for example, 11140 + ... + 11229.

It is an arithmetic number, because the mean of its divisors is an integer number (145405).

2^1006605 is an apocalyptic number.

1006605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1006605 is a deficient number, since it is larger than the sum of its proper divisors (738255).

1006605 is a wasteful number, since it uses less digits than its factorization.

1006605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22380 (or 22377 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1006605 is about 1003.2970646822. The cubic root of 1006605 is about 100.2196837040.

The spelling of 1006605 in words is "one million, six thousand, six hundred five".