1668741 has 8 divisors (see below), whose sum is σ = 2279424. Its totient is φ = 1085280.

The previous prime is 1668739. The next prime is 1668743. The reversal of 1668741 is 1478661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1668739) and next prime (1668743).

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

It is not a de Polignac number, because 1668741 - 2¹ = 1668739 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668743) 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, 6661 + ... + 6906.

It is an arithmetic number, because the mean of its divisors is an integer number (284928).

2^1668741 is an apocalyptic number.

It is an amenable number.

1668741 is a deficient number, since it is larger than the sum of its proper divisors (610683).

1668741 is a wasteful number, since it uses less digits than its factorization.

1668741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13611.

The product of its digits is 8064, while the sum is 33.

The square root of 1668741 is about 1291.7975847632. The cubic root of 1668741 is about 118.6122776397.

The spelling of 1668741 in words is "one million, six hundred sixty-eight thousand, seven hundred forty-one".