1668252 has 12 divisors (see below), whose sum is σ = 3892616. Its totient is φ = 556080.

The previous prime is 1668241. The next prime is 1668253. The reversal of 1668252 is 2528661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668253) 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 3 ways as a sum of consecutive naturals, for example, 69499 + ... + 69522.

2^1668252 is an apocalyptic number.

1668252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1668252 is an abundant number, since it is smaller than the sum of its proper divisors (2224364).

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

1668252 is a wasteful number, since it uses less digits than its factorization.

1668252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139028 (or 139026 counting only the distinct ones).

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

The square root of 1668252 is about 1291.6082997565. The cubic root of 1668252 is about 118.6006906468.

The spelling of 1668252 in words is "one million, six hundred sixty-eight thousand, two hundred fifty-two".