1091120 has 40 divisors (see below), whose sum is σ = 2651616. Its totient is φ = 416768.

The previous prime is 1091119. The next prime is 1091137. The reversal of 1091120 is 211901.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1091095 and 1091104.

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, 1544 + ... + 2136.

2^1091120 is an apocalyptic number.

1091120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325808).

1091120 is an abundant number, since it is smaller than the sum of its proper divisors (1560496).

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

1091120 is a wasteful number, since it uses less digits than its factorization.

1091120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1091120 is about 1044.5668958951. The cubic root of 1091120 is about 102.9494835073.

The spelling of 1091120 in words is "one million, ninety-one thousand, one hundred twenty".