1668231 has 6 divisors (see below), whose sum is σ = 2409680. Its totient is φ = 1112148.

The previous prime is 1668229. The next prime is 1668241. The reversal of 1668231 is 1328661.

It is not a de Polignac number, because 1668231 - 2¹ = 1668229 is a prime.

It is a super-2 number, since 2×1668231² = 5565989338722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1668195 and 1668204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668211) 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 5 ways as a sum of consecutive naturals, for example, 92671 + ... + 92688.

2^1668231 is an apocalyptic number.

1668231 is a deficient number, since it is larger than the sum of its proper divisors (741449).

1668231 is a wasteful number, since it uses less digits than its factorization.

1668231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185365 (or 185362 counting only the distinct ones).

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

The square root of 1668231 is about 1291.6001703314. The cubic root of 1668231 is about 118.6001929952.

The spelling of 1668231 in words is "one million, six hundred sixty-eight thousand, two hundred thirty-one".