1668522 has 8 divisors (see below), whose sum is σ = 3337056. Its totient is φ = 556172.

The previous prime is 1668521. The next prime is 1668539. The reversal of 1668522 is 2258661.

It is a sphenic number, since it is the product of 3 distinct primes.

1668522 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1668522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139038 + ... + 139049.

It is an arithmetic number, because the mean of its divisors is an integer number (417132).

2^1668522 is an apocalyptic number.

1668522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1668522 is a wasteful number, since it uses less digits than its factorization.

1668522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278092.

The product of its digits is 5760, while the sum is 30.

The square root of 1668522 is about 1291.7128163799. The cubic root of 1668522 is about 118.6070886528.

The spelling of 1668522 in words is "one million, six hundred sixty-eight thousand, five hundred twenty-two".