1182820 has 12 divisors (see below), whose sum is σ = 2483964. Its totient is φ = 473120.

The previous prime is 1182817. The next prime is 1182847. The reversal of 1182820 is 282811.

It can be written as a sum of positive squares in 2 ways, for example, as 580644 + 602176 = 762^2 + 776^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1182791 and 1182800.

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 3 ways as a sum of consecutive naturals, for example, 29551 + ... + 29590.

It is an arithmetic number, because the mean of its divisors is an integer number (206997).

2^1182820 is an apocalyptic number.

1182820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1182820 is an abundant number, since it is smaller than the sum of its proper divisors (1301144).

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

1182820 is a wasteful number, since it uses less digits than its factorization.

1182820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59150 (or 59148 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1182820 is about 1087.5752847504. The cubic root of 1182820 is about 105.7562930901.

Subtracting from 1182820 its reverse (282811), we obtain a palindrome (900009).

It can be divided in two parts, 1182 and 820, that added together give a palindrome (2002).

The spelling of 1182820 in words is "one million, one hundred eighty-two thousand, eight hundred twenty".