1800117 has 48 divisors (see below), whose sum is σ = 3192000. Its totient is φ = 997920.

The previous prime is 1800103. The next prime is 1800119. The reversal of 1800117 is 7110081.

It is not a de Polignac number, because 1800117 - 2¹² = 1796021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1800117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62059 + ... + 62087.

It is an arithmetic number, because the mean of its divisors is an integer number (66500).

2^1800117 is an apocalyptic number.

It is an amenable number.

1800117 is a deficient number, since it is larger than the sum of its proper divisors (1391883).

1800117 is a wasteful number, since it uses less digits than its factorization.

1800117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

The square root of 1800117 is about 1341.6843891169. The cubic root of 1800117 is about 121.6466754752.

Adding to 1800117 its reverse (7110081), we get a palindrome (8910198).

The spelling of 1800117 in words is "one million, eight hundred thousand, one hundred seventeen".