1091288 has 16 divisors (see below), whose sum is σ = 2232360. Its totient is φ = 496000.

The previous prime is 1091287. The next prime is 1091329. The reversal of 1091288 is 8821901.

It is a self number, because there is not a number n which added to its sum of digits gives 1091288.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091287) 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, 6113 + ... + 6288.

2^1091288 is an apocalyptic number.

It is an amenable number.

1091288 is an abundant number, since it is smaller than the sum of its proper divisors (1141072).

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

1091288 is a wasteful number, since it uses less digits than its factorization.

1091288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12418 (or 12414 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1091288 is about 1044.6473089038. The cubic root of 1091288 is about 102.9547669548.

The spelling of 1091288 in words is "one million, ninety-one thousand, two hundred eighty-eight".