1805113 has 4 divisors (see below), whose sum is σ = 1815268. Its totient is φ = 1794960.

The previous prime is 1805093. The next prime is 1805117. The reversal of 1805113 is 3115081.

It is the 549-th star number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3115081 = 1753 ⋅1777.

It can be written as a sum of positive squares in 2 ways, for example, as 94249 + 1710864 = 307^2 + 1308^2 .

It is a cyclic number.

It is not a de Polignac number, because 1805113 - 2⁵ = 1805081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1805117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4806 + ... + 5167.

It is an arithmetic number, because the mean of its divisors is an integer number (453817).

2^1805113 is an apocalyptic number.

It is an amenable number.

1805113 is a deficient number, since it is larger than the sum of its proper divisors (10155).

1805113 is an equidigital number, since it uses as much as digits as its factorization.

1805113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10154.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1805113 is about 1343.5449378417. The cubic root of 1805113 is about 121.7591099104.

The spelling of 1805113 in words is "one million, eight hundred five thousand, one hundred thirteen".