1085520 has 40 divisors (see below), whose sum is σ = 3365856. Its totient is φ = 289408.

The previous prime is 1085509. The next prime is 1085521. The reversal of 1085520 is 255801.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2022 + ... + 2501.

2^1085520 is an apocalyptic number.

1085520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1085520 is an abundant number, since it is smaller than the sum of its proper divisors (2280336).

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

1085520 is a wasteful number, since it uses less digits than its factorization.

1085520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539 (or 4533 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1085520 is about 1041.8829108878. The cubic root of 1085520 is about 102.7730573813.

The spelling of 1085520 in words is "one million, eighty-five thousand, five hundred twenty".