1091536 has 20 divisors (see below), whose sum is σ = 2239812. Its totient is φ = 513536.

The previous prime is 1091527. The next prime is 1091549. The reversal of 1091536 is 6351901.

It can be written as a sum of positive squares in 2 ways, for example, as 883600 + 207936 = 940^2 + 456^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1091536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1735 + ... + 2278.

2^1091536 is an apocalyptic number.

1091536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1091536 is an abundant number, since it is smaller than the sum of its proper divisors (1148276).

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

1091536 is a wasteful number, since it uses less digits than its factorization.

1091536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038 (or 4032 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 1091536 is about 1044.7660025097. The cubic root of 1091536 is about 102.9625653387.

The spelling of 1091536 in words is "one million, ninety-one thousand, five hundred thirty-six".