1009205 has 16 divisors (see below), whose sum is σ = 1327104. Its totient is φ = 733440.

The previous prime is 1009201. The next prime is 1009207. The reversal of 1009205 is 5029001.

It is not a de Polignac number, because 1009205 - 2² = 1009201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009201) 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, 2444 + ... + 2826.

It is an arithmetic number, because the mean of its divisors is an integer number (82944).

2^1009205 is an apocalyptic number.

It is an amenable number.

1009205 is a deficient number, since it is larger than the sum of its proper divisors (317899).

1009205 is a wasteful number, since it uses less digits than its factorization.

1009205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1009205 is about 1004.5919569656. The cubic root of 1009205 is about 100.3058966516.

The spelling of 1009205 in words is "one million, nine thousand, two hundred five".