1091208 has 32 divisors (see below), whose sum is σ = 2872800. Its totient is φ = 344448.

The previous prime is 1091191. The next prime is 1091219. The reversal of 1091208 is 8021901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741 + ... + 1652.

It is an arithmetic number, because the mean of its divisors is an integer number (89775).

2^1091208 is an apocalyptic number.

It is an amenable number.

1091208 is an abundant number, since it is smaller than the sum of its proper divisors (1781592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1091208 is a wasteful number, since it uses less digits than its factorization.

1091208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421 (or 2417 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1091208 is about 1044.6090177669. The cubic root of 1091208 is about 102.9522510950.

The spelling of 1091208 in words is "one million, ninety-one thousand, two hundred eight".