1801284 has 12 divisors (see below), whose sum is σ = 4203024. Its totient is φ = 600424.

The previous prime is 1801273. The next prime is 1801297. The reversal of 1801284 is 4821081.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75042 + ... + 75065.

It is an arithmetic number, because the mean of its divisors is an integer number (350252).

2^1801284 is an apocalyptic number.

It is an amenable number.

1801284 is an abundant number, since it is smaller than the sum of its proper divisors (2401740).

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

1801284 is a wasteful number, since it uses less digits than its factorization.

1801284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150114 (or 150112 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 1801284 is about 1342.1192197417. The cubic root of 1801284 is about 121.6729572861.

The spelling of 1801284 in words is "one million, eight hundred one thousand, two hundred eighty-four".