1001143 has 8 divisors (see below), whose sum is σ = 1176336. Its totient is φ = 840000.

The previous prime is 1001123. The next prime is 1001153. The reversal of 1001143 is 3411001.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001143 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 (1001123) 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, 3358 + ... + 3643.

It is an arithmetic number, because the mean of its divisors is an integer number (147042).

2^1001143 is an apocalyptic number.

1001143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1001143 is a deficient number, since it is larger than the sum of its proper divisors (175193).

1001143 is a wasteful number, since it uses less digits than its factorization.

1001143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1001143 is about 1000.5713367871. The cubic root of 1001143 is about 100.0380854931.

Adding to 1001143 its reverse (3411001), we get a palindrome (4412144).

The spelling of 1001143 in words is "one million, one thousand, one hundred forty-three".