42252543 has 8 divisors (see below), whose sum is σ = 62596400. Its totient is φ = 28168344.

The previous prime is 42252499. The next prime is 42252547. The reversal of 42252543 is 34525224.

It is a happy number.

It is not a de Polignac number, because 42252543 - 2¹⁶ = 42187007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1564909 = 42252543 / (4 + 2 + 2 + 5 + 2 + 5 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42252547) 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, 782428 + ... + 782481.

It is an arithmetic number, because the mean of its divisors is an integer number (7824550).

Almost surely, 2^42252543 is an apocalyptic number.

42252543 is a deficient number, since it is larger than the sum of its proper divisors (20343857).

42252543 is a wasteful number, since it uses less digits than its factorization.

42252543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564918 (or 1564912 counting only the distinct ones).

The product of its digits is 9600, while the sum is 27.

The square root of 42252543 is about 6500.1956124412. The cubic root of 42252543 is about 348.2979760566.

Adding to 42252543 its reverse (34525224), we get a palindrome (76777767).

The spelling of 42252543 in words is "forty-two million, two hundred fifty-two thousand, five hundred forty-three".