1669742 has 8 divisors (see below), whose sum is σ = 2511432. Its totient is φ = 832600.

The previous prime is 1669741. The next prime is 1669747. The reversal of 1669742 is 2479661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669741) 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 3 ways as a sum of consecutive naturals, for example, 17 + ... + 1827.

It is an arithmetic number, because the mean of its divisors is an integer number (313929).

2^1669742 is an apocalyptic number.

1669742 is a deficient number, since it is larger than the sum of its proper divisors (841690).

1669742 is a wasteful number, since it uses less digits than its factorization.

1669742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274.

The product of its digits is 18144, while the sum is 35.

The square root of 1669742 is about 1292.1849712793. The cubic root of 1669742 is about 118.6359895593.

The spelling of 1669742 in words is "one million, six hundred sixty-nine thousand, seven hundred forty-two".