1801288 has 8 divisors (see below), whose sum is σ = 3377430. Its totient is φ = 900640.

The previous prime is 1801273. The next prime is 1801297. The reversal of 1801288 is 8821081.

It can be written as a sum of positive squares in only one way, i.e., 1800964 + 324 = 1342^2 + 18^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

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 as a sum of consecutive naturals, namely, 112573 + ... + 112588.

2^1801288 is an apocalyptic number.

It is an amenable number.

1801288 is a deficient number, since it is larger than the sum of its proper divisors (1576142).

1801288 is a wasteful number, since it uses less digits than its factorization.

1801288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225167 (or 225163 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 1801288 is about 1342.1207099214. The cubic root of 1801288 is about 121.6730473499.

The spelling of 1801288 in words is "one million, eight hundred one thousand, two hundred eighty-eight".