1668235 has 4 divisors (see below), whose sum is σ = 2001888. Its totient is φ = 1334584.

The previous prime is 1668229. The next prime is 1668241. The reversal of 1668235 is 5328661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5328661 = 13 ⋅409897.

It is an interprime number because it is at equal distance from previous prime (1668229) and next prime (1668241).

It is a cyclic number.

It is not a de Polignac number, because 1668235 - 2⁹ = 1667723 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1668197 and 1668206.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 166819 + ... + 166828.

It is an arithmetic number, because the mean of its divisors is an integer number (500472).

2^1668235 is an apocalyptic number.

1668235 is a deficient number, since it is larger than the sum of its proper divisors (333653).

1668235 is an equidigital number, since it uses as much as digits as its factorization.

1668235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333652.

The product of its digits is 8640, while the sum is 31.

The square root of 1668235 is about 1291.6017187972. The cubic root of 1668235 is about 118.6002877863.

The spelling of 1668235 in words is "one million, six hundred sixty-eight thousand, two hundred thirty-five".