40242143 has 8 divisors (see below), whose sum is σ = 40983600. Its totient is φ = 39504960.

The previous prime is 40242119. The next prime is 40242173. The reversal of 40242143 is 34124204.

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

It is a cyclic number.

It is not a de Polignac number, because 40242143 - 2⁶ = 40242079 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 (40242113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22523 + ... + 24243.

It is an arithmetic number, because the mean of its divisors is an integer number (5122950).

Almost surely, 2^40242143 is an apocalyptic number.

40242143 is a deficient number, since it is larger than the sum of its proper divisors (741457).

40242143 is a wasteful number, since it uses less digits than its factorization.

40242143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40242143 is about 6343.6695216570. The cubic root of 40242143 is about 342.6838993228.

Adding to 40242143 its reverse (34124204), we get a palindrome (74366347).

The spelling of 40242143 in words is "forty million, two hundred forty-two thousand, one hundred forty-three".