1669143 has 16 divisors (see below), whose sum is σ = 2587136. Its totient is φ = 937440.

The previous prime is 1669141. The next prime is 1669147. The reversal of 1669143 is 3419661.

It is not a de Polignac number, because 1669143 - 2¹ = 1669141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1669143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669141) 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 15 ways as a sum of consecutive naturals, for example, 630 + ... + 1932.

It is an arithmetic number, because the mean of its divisors is an integer number (161696).

2^1669143 is an apocalyptic number.

1669143 is a deficient number, since it is larger than the sum of its proper divisors (917993).

1669143 is a wasteful number, since it uses less digits than its factorization.

1669143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374.

The product of its digits is 3888, while the sum is 30.

The square root of 1669143 is about 1291.9531725260. The cubic root of 1669143 is about 118.6218014478.

The spelling of 1669143 in words is "one million, six hundred sixty-nine thousand, one hundred forty-three".