42180143 has 2 divisors, whose sum is σ = 42180144. Its totient is φ = 42180142.

The previous prime is 42180139. The next prime is 42180161. The reversal of 42180143 is 34108124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42180143 - 2² = 42180139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42180113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21090071 + 21090072.

It is an arithmetic number, because the mean of its divisors is an integer number (21090072).

Almost surely, 2^42180143 is an apocalyptic number.

42180143 is a deficient number, since it is larger than the sum of its proper divisors (1).

42180143 is an equidigital number, since it uses as much as digits as its factorization.

42180143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 42180143 is about 6494.6241615662. The cubic root of 42180143 is about 348.0989253925.

Adding to 42180143 its reverse (34108124), we get a palindrome (76288267).

The spelling of 42180143 in words is "forty-two million, one hundred eighty thousand, one hundred forty-three".