42530143 has 4 divisors (see below), whose sum is σ = 42840720. Its totient is φ = 42219568.

The previous prime is 42530119. The next prime is 42530179. The reversal of 42530143 is 34103524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42530143 - 2¹³ = 42521951 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 (42530743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155083 + ... + 155356.

It is an arithmetic number, because the mean of its divisors is an integer number (10710180).

Almost surely, 2^42530143 is an apocalyptic number.

42530143 is a deficient number, since it is larger than the sum of its proper divisors (310577).

42530143 is a wasteful number, since it uses less digits than its factorization.

42530143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310576.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 42530143 is about 6521.5138579934. The cubic root of 42530143 is about 349.0590863909.

Adding to 42530143 its reverse (34103524), we get a palindrome (76633667).

The spelling of 42530143 in words is "forty-two million, five hundred thirty thousand, one hundred forty-three".