1868105 has 4 divisors (see below), whose sum is σ = 2241732. Its totient is φ = 1494480.

The previous prime is 1868063. The next prime is 1868107. The reversal of 1868105 is 5018681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5018681 = 1117 ⋅4493.

It can be written as a sum of positive squares in 2 ways, for example, as 1394761 + 473344 = 1181^2 + 688^2 .

It is not a de Polignac number, because 1868105 - 2⁸ = 1867849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1868107) 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, 186806 + ... + 186815.

It is an arithmetic number, because the mean of its divisors is an integer number (560433).

2^1868105 is an apocalyptic number.

It is an amenable number.

1868105 is a deficient number, since it is larger than the sum of its proper divisors (373627).

1868105 is an equidigital number, since it uses as much as digits as its factorization.

1868105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373626.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1868105 is about 1366.7863768709. The cubic root of 1868105 is about 123.1592666613.

The spelling of 1868105 in words is "one million, eight hundred sixty-eight thousand, one hundred five".