4020143 has 4 divisors (see below), whose sum is σ = 4256640. Its totient is φ = 3783648.

The previous prime is 4020139. The next prime is 4020151. The reversal of 4020143 is 3410204.

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 4020143 - 2² = 4020139 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 (4022143) 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, 118223 + ... + 118256.

It is an arithmetic number, because the mean of its divisors is an integer number (1064160).

Almost surely, 2^4020143 is an apocalyptic number.

4020143 is a deficient number, since it is larger than the sum of its proper divisors (236497).

4020143 is a wasteful number, since it uses less digits than its factorization.

4020143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236496.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 4020143 is about 2005.0294262180. The cubic root of 4020143 is about 159.0061176661.

Adding to 4020143 its reverse (3410204), we get a palindrome (7430347).

The spelling of 4020143 in words is "four million, twenty thousand, one hundred forty-three".