1001166143 has 4 divisors (see below), whose sum is σ = 1001433888. Its totient is φ = 1000898400.

The previous prime is 1001166139. The next prime is 1001166157. The reversal of 1001166143 is 3416611001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3416611001 = 33637 ⋅101573.

It is a cyclic number.

It is not a de Polignac number, because 1001166143 - 2² = 1001166139 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 (1001166163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128183 + ... + 135768.

It is an arithmetic number, because the mean of its divisors is an integer number (250358472).

Almost surely, 2^1001166143 is an apocalyptic number.

1001166143 is a deficient number, since it is larger than the sum of its proper divisors (267745).

1001166143 is an equidigital number, since it uses as much as digits as its factorization.

1001166143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267744.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1001166143 is about 31641.2095691679. The cubic root of 1001166143 is about 1000.3885633323.

Adding to 1001166143 its reverse (3416611001), we get a palindrome (4417777144).

The spelling of 1001166143 in words is "one billion, one million, one hundred sixty-six thousand, one hundred forty-three".