8001143 has 4 divisors (see below), whose sum is σ = 8078928. Its totient is φ = 7923360.

The previous prime is 8001107. The next prime is 8001157. The reversal of 8001143 is 3411008.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8001143 - 2⁸ = 8000887 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8001163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38738 + ... + 38943.

It is an arithmetic number, because the mean of its divisors is an integer number (2019732).

Almost surely, 2^8001143 is an apocalyptic number.

8001143 is a deficient number, since it is larger than the sum of its proper divisors (77785).

8001143 is a wasteful number, since it uses less digits than its factorization.

8001143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77784.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 8001143 is about 2828.6291732923. The cubic root of 8001143 is about 200.0095245464.

The spelling of 8001143 in words is "eight million, one thousand, one hundred forty-three".