1806105 has 32 divisors (see below), whose sum is σ = 3354624. Its totient is φ = 812736.

The previous prime is 1806089. The next prime is 1806107. The reversal of 1806105 is 5016081.

It is not a de Polignac number, because 1806105 - 2⁴ = 1806089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1806107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10732 + ... + 10898.

It is an arithmetic number, because the mean of its divisors is an integer number (104832).

2^1806105 is an apocalyptic number.

1806105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1806105 is a deficient number, since it is larger than the sum of its proper divisors (1548519).

1806105 is a wasteful number, since it uses less digits than its factorization.

1806105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1806105 is about 1343.9140597523. The cubic root of 1806105 is about 121.7814100689.

The spelling of 1806105 in words is "one million, eight hundred six thousand, one hundred five".