4001143 has 4 divisors (see below), whose sum is σ = 4109320. Its totient is φ = 3892968.

The previous prime is 4001141. The next prime is 4001147. The reversal of 4001143 is 3411004.

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 4001143 - 2¹ = 4001141 is a prime.

It is a Duffinian number.

4001143 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001141) 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, 54033 + ... + 54106.

It is an arithmetic number, because the mean of its divisors is an integer number (1027330).

Almost surely, 2^4001143 is an apocalyptic number.

4001143 is a deficient number, since it is larger than the sum of its proper divisors (108177).

4001143 is a wasteful number, since it uses less digits than its factorization.

4001143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108176.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 4001143 is about 2000.2857295897. The cubic root of 4001143 is about 158.7552237519.

Adding to 4001143 its reverse (3411004), we get a palindrome (7412147).

The spelling of 4001143 in words is "four million, one thousand, one hundred forty-three".