1660143 has 8 divisors (see below), whose sum is σ = 2285056. Its totient is φ = 1071000.

The previous prime is 1660133. The next prime is 1660177. The reversal of 1660143 is 3410661.

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

It is not a de Polignac number, because 1660143 - 2⁵ = 1660111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660103) 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, 8833 + ... + 9018.

It is an arithmetic number, because the mean of its divisors is an integer number (285632).

2^1660143 is an apocalyptic number.

1660143 is a deficient number, since it is larger than the sum of its proper divisors (624913).

1660143 is a wasteful number, since it uses less digits than its factorization.

1660143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17885.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1660143 is about 1288.4653662400. The cubic root of 1660143 is about 118.4082146343.

The spelling of 1660143 in words is "one million, six hundred sixty thousand, one hundred forty-three".