1668212 has 24 divisors (see below), whose sum is σ = 3593856. Its totient is φ = 659808.

The previous prime is 1668211. The next prime is 1668229. The reversal of 1668212 is 2128661.

It is a Harshad number since it is a multiple of its sum of digits (26).

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 7 ways as a sum of consecutive naturals, for example, 1928 + ... + 2655.

It is an arithmetic number, because the mean of its divisors is an integer number (149744).

2^1668212 is an apocalyptic number.

It is an amenable number.

1668212 is an abundant number, since it is smaller than the sum of its proper divisors (1925644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1668212 is a wasteful number, since it uses less digits than its factorization.

1668212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607 (or 4605 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 1668212 is about 1291.5928150931. The cubic root of 1668212 is about 118.5997427353.

The spelling of 1668212 in words is "one million, six hundred sixty-eight thousand, two hundred twelve".