1802120 has 16 divisors (see below), whose sum is σ = 4054860. Its totient is φ = 720832.

The previous prime is 1802117. The next prime is 1802137. The reversal of 1802120 is 212081.

It can be written as a sum of positive squares in 2 ways, for example, as 1800964 + 1156 = 1342^2 + 34^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1802095 and 1802104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22487 + ... + 22566.

2^1802120 is an apocalyptic number.

1802120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1802120 is an abundant number, since it is smaller than the sum of its proper divisors (2252740).

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

1802120 is a wasteful number, since it uses less digits than its factorization.

1802120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45064 (or 45060 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1802120 is about 1342.4306313549. The cubic root of 1802120 is about 121.6917777239.

The spelling of 1802120 in words is "one million, eight hundred two thousand, one hundred twenty".