1801287 has 12 divisors (see below), whose sum is σ = 2615184. Its totient is φ = 1194720.

The previous prime is 1801273. The next prime is 1801297. The reversal of 1801287 is 7821081.

It is not a de Polignac number, because 1801287 - 2⁶ = 1801223 is a prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1801287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801207) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1987 + ... + 2747.

It is an arithmetic number, because the mean of its divisors is an integer number (217932).

2^1801287 is an apocalyptic number.

1801287 is a deficient number, since it is larger than the sum of its proper divisors (813897).

1801287 is a wasteful number, since it uses less digits than its factorization.

1801287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030 (or 1027 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1801287 is about 1342.1203373766. The cubic root of 1801287 is about 121.6730248340.

The spelling of 1801287 in words is "one million, eight hundred one thousand, two hundred eighty-seven".