1091392 has 14 divisors (see below), whose sum is σ = 2165858. Its totient is φ = 545664.

The previous prime is 1091381. The next prime is 1091393. The reversal of 1091392 is 2931901.

It can be written as a sum of positive squares in only one way, i.e., 876096 + 215296 = 936^2 + 464^2 .

It is a super-3 number, since 3×1091392³ = 3899990533375524864, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091393) by changing a digit.

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 as a sum of consecutive naturals, namely, 8463 + ... + 8590.

2^1091392 is an apocalyptic number.

It is an amenable number.

1091392 is a deficient number, since it is larger than the sum of its proper divisors (1074466).

1091392 is an equidigital number, since it uses as much as digits as its factorization.

1091392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17065 (or 17055 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1091392 is about 1044.6970852836. The cubic root of 1091392 is about 102.9580373886.

The spelling of 1091392 in words is "one million, ninety-one thousand, three hundred ninety-two".