1080820 has 24 divisors (see below), whose sum is σ = 2444904. Its totient is φ = 398976.

The previous prime is 1080817. The next prime is 1080823. The reversal of 1080820 is 280801.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1080817) and next prime (1080823).

It can be written as a sum of positive squares in 4 ways, for example, as 11664 + 1069156 = 108^2 + 1034^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1819 + ... + 2338.

It is an arithmetic number, because the mean of its divisors is an integer number (101871).

2^1080820 is an apocalyptic number.

1080820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1080820 is an abundant number, since it is smaller than the sum of its proper divisors (1364084).

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

1080820 is a wasteful number, since it uses less digits than its factorization.

1080820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4179 (or 4177 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1080820 is about 1039.6249323674. The cubic root of 1080820 is about 102.6245165331.

Subtracting from 1080820 its sum of digits (19), we obtain a palindrome (1080801).

The spelling of 1080820 in words is "one million, eighty thousand, eight hundred twenty".