1800113 has 12 divisors (see below), whose sum is σ = 2218212. Its totient is φ = 1451520.

The previous prime is 1800103. The next prime is 1800119. The reversal of 1800113 is 3110081.

1800113 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 2 ways, for example, as 1270129 + 529984 = 1127^2 + 728^2 .

It is not a de Polignac number, because 1800113 - 2¹⁰ = 1799089 is a prime.

It is a Duffinian 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 11 ways as a sum of consecutive naturals, for example, 248 + ... + 1913.

It is an arithmetic number, because the mean of its divisors is an integer number (184851).

2^1800113 is an apocalyptic number.

It is an amenable number.

1800113 is a deficient number, since it is larger than the sum of its proper divisors (418099).

1800113 is a wasteful number, since it uses less digits than its factorization.

1800113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192 (or 2185 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1800113 is about 1341.6828984525. The cubic root of 1800113 is about 121.6465853724.

Adding to 1800113 its reverse (3110081), we get a palindrome (4910194).

The spelling of 1800113 in words is "one million, eight hundred thousand, one hundred thirteen".