1668534 has 16 divisors (see below), whose sum is σ = 3813888. Its totient is φ = 476712.

The previous prime is 1668521. The next prime is 1668539. The reversal of 1668534 is 4358661.

1668534 is nontrivially palindromic in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 1668495 and 1668504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19822 + ... + 19905.

It is an arithmetic number, because the mean of its divisors is an integer number (238368).

2^1668534 is an apocalyptic number.

1668534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1668534 is an abundant number, since it is smaller than the sum of its proper divisors (2145354).

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

1668534 is a wasteful number, since it uses less digits than its factorization.

1668534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39739.

The product of its digits is 17280, while the sum is 33.

The square root of 1668534 is about 1291.7174613668. The cubic root of 1668534 is about 118.6073729926.

The spelling of 1668534 in words is "one million, six hundred sixty-eight thousand, five hundred thirty-four".