40420143 has 12 divisors (see below), whose sum is σ = 58921720. Its totient is φ = 26698896.

The previous prime is 40420123. The next prime is 40420147. The reversal of 40420143 is 34102404.

40420143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40420143 - 2⁵ = 40420111 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 (40420147) 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 11 ways as a sum of consecutive naturals, for example, 19621 + ... + 21582.

Almost surely, 2^40420143 is an apocalyptic number.

40420143 is a deficient number, since it is larger than the sum of its proper divisors (18501577).

40420143 is a wasteful number, since it uses less digits than its factorization.

40420143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41318 (or 41315 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40420143 is about 6357.6837763450. The cubic root of 40420143 is about 343.1884120413.

Adding to 40420143 its reverse (34102404), we get a palindrome (74522547).

The spelling of 40420143 in words is "forty million, four hundred twenty thousand, one hundred forty-three".