1801117 has 2 divisors, whose sum is σ = 1801118. Its totient is φ = 1801116.

The previous prime is 1801109. The next prime is 1801187. The reversal of 1801117 is 7111081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1705636 + 95481 = 1306^2 + 309^2 .

It is a cyclic number.

It is not a de Polignac number, because 1801117 - 2³ = 1801109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1801094 and 1801103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1801187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900558 + 900559.

It is an arithmetic number, because the mean of its divisors is an integer number (900559).

2^1801117 is an apocalyptic number.

It is an amenable number.

1801117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1801117 is an equidigital number, since it uses as much as digits as its factorization.

1801117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 19.

The square root of 1801117 is about 1342.0570032603. The cubic root of 1801117 is about 121.6691970033.

Adding to 1801117 its reverse (7111081), we get a palindrome (8912198).

The spelling of 1801117 in words is "one million, eight hundred one thousand, one hundred seventeen".