1840123 has 2 divisors, whose sum is σ = 1840124. Its totient is φ = 1840122.

The previous prime is 1840117. The next prime is 1840171. The reversal of 1840123 is 3210481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1840123 - 2⁹ = 1839611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1840123.

It is not a weakly prime, because it can be changed into another prime (1840183) 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 as a sum of consecutive naturals, namely, 920061 + 920062.

It is an arithmetic number, because the mean of its divisors is an integer number (920062).

2^1840123 is an apocalyptic number.

1840123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840123 is an equidigital number, since it uses as much as digits as its factorization.

1840123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1840123 is about 1356.5113342689. The cubic root of 1840123 is about 122.5412439215.

The spelling of 1840123 in words is "one million, eight hundred forty thousand, one hundred twenty-three".