1850105 has 4 divisors (see below), whose sum is σ = 2220132. Its totient is φ = 1480080.

The previous prime is 1850089. The next prime is 1850119. The reversal of 1850105 is 5010581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 478864 + 1371241 = 692^2 + 1171^2 .

It is not a de Polignac number, because 1850105 - 2⁴ = 1850089 is a prime.

It is a super-2 number, since 2×1850105² = 6845777022050, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185006 + ... + 185015.

It is an arithmetic number, because the mean of its divisors is an integer number (555033).

2^1850105 is an apocalyptic number.

It is an amenable number.

1850105 is a deficient number, since it is larger than the sum of its proper divisors (370027).

1850105 is an equidigital number, since it uses as much as digits as its factorization.

1850105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370026.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1850105 is about 1360.1856490935. The cubic root of 1850105 is about 122.7624250637.

Adding to 1850105 its reverse (5010581), we get a palindrome (6860686).

The spelling of 1850105 in words is "one million, eight hundred fifty thousand, one hundred five".