1080209 has 4 divisors (see below), whose sum is σ = 1163316. Its totient is φ = 997104.

The previous prime is 1080199. The next prime is 1080217. The reversal of 1080209 is 9020801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9020801 = 19 ⋅474779.

It can be written as a sum of positive squares in 2 ways, for example, as 305809 + 774400 = 553^2 + 880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1080209 - 2¹² = 1076113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (1080229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41534 + ... + 41559.

It is an arithmetic number, because the mean of its divisors is an integer number (290829).

2^1080209 is an apocalyptic number.

It is an amenable number.

1080209 is a deficient number, since it is larger than the sum of its proper divisors (83107).

1080209 is an equidigital number, since it uses as much as digits as its factorization.

1080209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83106.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1080209 is about 1039.3310348489. The cubic root of 1080209 is about 102.6051746140.

The spelling of 1080209 in words is "one million, eighty thousand, two hundred nine".