1668123 has 12 divisors (see below), whose sum is σ = 2443480. Its totient is φ = 1096416.

The previous prime is 1668119. The next prime is 1668131. The reversal of 1668123 is 3218661.

It is not a de Polignac number, because 1668123 - 2² = 1668119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 613 + ... + 1926.

2^1668123 is an apocalyptic number.

1668123 is a deficient number, since it is larger than the sum of its proper divisors (775357).

1668123 is a wasteful number, since it uses less digits than its factorization.

1668123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618 (or 2615 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1668123 is about 1291.5583610507. The cubic root of 1668123 is about 118.5976335780.

The spelling of 1668123 in words is "one million, six hundred sixty-eight thousand, one hundred twenty-three".