1089520 has 20 divisors (see below), whose sum is σ = 2533320. Its totient is φ = 435776.

The previous prime is 1089509. The next prime is 1089523. The reversal of 1089520 is 259801.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6730 + ... + 6889.

It is an arithmetic number, because the mean of its divisors is an integer number (126666).

2^1089520 is an apocalyptic number.

1089520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1089520 is an abundant number, since it is smaller than the sum of its proper divisors (1443800).

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

1089520 is a wasteful number, since it uses less digits than its factorization.

1089520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13632 (or 13626 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1089520 is about 1043.8007472693. The cubic root of 1089520 is about 102.8991377607.

The spelling of 1089520 in words is "one million, eighty-nine thousand, five hundred twenty".