40021143 has 8 divisors (see below), whose sum is σ = 53468400. Its totient is φ = 26627328.

The previous prime is 40021123. The next prime is 40021147. The reversal of 40021143 is 34112004.

40021143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 40021143 - 2¹⁰ = 40020119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021147) 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, 11578 + ... + 14631.

It is an arithmetic number, because the mean of its divisors is an integer number (6683550).

Almost surely, 2^40021143 is an apocalyptic number.

40021143 is a deficient number, since it is larger than the sum of its proper divisors (13447257).

40021143 is a wasteful number, since it uses less digits than its factorization.

40021143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26721.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 40021143 is about 6326.2266004309. The cubic root of 40021143 is about 342.0554354241.

Adding to 40021143 its reverse (34112004), we get a palindrome (74133147).

The spelling of 40021143 in words is "forty million, twenty-one thousand, one hundred forty-three".