1009005 has 16 divisors (see below), whose sum is σ = 1629504. Its totient is φ = 533120.

The previous prime is 1008991. The next prime is 1009007. The reversal of 1009005 is 5009001.

It is not a de Polignac number, because 1009005 - 2⁴ = 1008989 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1810 + ... + 2300.

It is an arithmetic number, because the mean of its divisors is an integer number (101844).

2^1009005 is an apocalyptic number.

1009005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1009005 is a deficient number, since it is larger than the sum of its proper divisors (620499).

1009005 is a wasteful number, since it uses less digits than its factorization.

1009005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

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

The square root of 1009005 is about 1004.4924091301. The cubic root of 1009005 is about 100.2992701470.

The spelling of 1009005 in words is "one million, nine thousand, five".