1806123 has 16 divisors (see below), whose sum is σ = 2649600. Its totient is φ = 1085280.

The previous prime is 1806113. The next prime is 1806137. The reversal of 1806123 is 3216081.

It is not a de Polignac number, because 1806123 - 2⁴ = 1806107 is a prime.

It is a super-2 number, since 2×1806123² = 6524160582258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1806123.

It is not an unprimeable number, because it can be changed into a prime (1806113) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7438 + ... + 7676.

It is an arithmetic number, because the mean of its divisors is an integer number (165600).

2^1806123 is an apocalyptic number.

1806123 is a deficient number, since it is larger than the sum of its proper divisors (843477).

1806123 is a wasteful number, since it uses less digits than its factorization.

1806123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1806123 is about 1343.9207565924. The cubic root of 1806123 is about 121.7818146334.

The spelling of 1806123 in words is "one million, eight hundred six thousand, one hundred twenty-three".