1966143 has 8 divisors (see below), whose sum is σ = 2692528. Its totient is φ = 1275264.

The previous prime is 1966127. The next prime is 1966163. The reversal of 1966143 is 3416691.

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

It is not a de Polignac number, because 1966143 - 2⁴ = 1966127 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1966143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8746 + ... + 8967.

It is an arithmetic number, because the mean of its divisors is an integer number (336566).

2^1966143 is an apocalyptic number.

1966143 is a deficient number, since it is larger than the sum of its proper divisors (726385).

1966143 is a wasteful number, since it uses less digits than its factorization.

1966143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17753.

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

The square root of 1966143 is about 1402.1922122163. The cubic root of 1966143 is about 125.2771025926.

The spelling of 1966143 in words is "one million, nine hundred sixty-six thousand, one hundred forty-three".