42040143 has 12 divisors (see below), whose sum is σ = 61032400. Its totient is φ = 27884736.

The previous prime is 42040121. The next prime is 42040151. The reversal of 42040143 is 34104024.

It is not a de Polignac number, because 42040143 - 2⁹ = 42039631 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 (42030143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9946 + ... + 13527.

Almost surely, 2^42040143 is an apocalyptic number.

42040143 is a deficient number, since it is larger than the sum of its proper divisors (18992257).

42040143 is a wasteful number, since it uses less digits than its factorization.

42040143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23678 (or 23675 counting only the distinct ones).

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

The square root of 42040143 is about 6483.8370584092. The cubic root of 42040143 is about 347.7133737783.

Adding to 42040143 its reverse (34104024), we get a palindrome (76144167).

The spelling of 42040143 in words is "forty-two million, forty thousand, one hundred forty-three".