1801120 has 24 divisors (see below), whose sum is σ = 4255524. Its totient is φ = 720384.

The previous prime is 1801117. The next prime is 1801187. The reversal of 1801120 is 211081.

It can be written as a sum of positive squares in 2 ways, for example, as 1774224 + 26896 = 1332^2 + 164^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1801120.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5469 + ... + 5788.

2^1801120 is an apocalyptic number.

1801120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1801120 is an abundant number, since it is smaller than the sum of its proper divisors (2454404).

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

1801120 is a wasteful number, since it uses less digits than its factorization.

1801120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11272 (or 11264 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1801120 is about 1342.0581209471. The cubic root of 1801120 is about 121.6692645554.

The spelling of 1801120 in words is "one million, eight hundred one thousand, one hundred twenty".