1080205 has 12 divisors (see below), whose sum is σ = 1508220. Its totient is φ = 740544.

The previous prime is 1080199. The next prime is 1080217. The reversal of 1080205 is 5020801.

1080205 = T₁₈₅ + T₁₈₆ + ... + T₂₃₃.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 213444 + 866761 = 462^2 + 931^2 .

It is not a de Polignac number, because 1080205 - 2⁵ = 1080173 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 1960 + ... + 2449.

It is an arithmetic number, because the mean of its divisors is an integer number (125685).

2^1080205 is an apocalyptic number.

It is an amenable number.

1080205 is a deficient number, since it is larger than the sum of its proper divisors (428015).

1080205 is an equidigital number, since it uses as much as digits as its factorization.

1080205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428 (or 4421 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1080205 is about 1039.3291105324. The cubic root of 1080205 is about 102.6050479653.

The spelling of 1080205 in words is "one million, eighty thousand, two hundred five".