42531242 has 8 divisors (see below), whose sum is σ = 68704356. Its totient is φ = 19629792.

The previous prime is 42531211. The next prime is 42531277. The reversal of 42531242 is 24213524.

It is a happy number.

42531242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42133081 + 398161 = 6491^2 + 631^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817883 + ... + 817934.

Almost surely, 2^42531242 is an apocalyptic number.

42531242 is a deficient number, since it is larger than the sum of its proper divisors (26173114).

42531242 is a wasteful number, since it uses less digits than its factorization.

42531242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635832.

The product of its digits is 1920, while the sum is 23.

The square root of 42531242 is about 6521.5981170262. The cubic root of 42531242 is about 349.0620929850.

Adding to 42531242 its reverse (24213524), we get a palindrome (66744766).

The spelling of 42531242 in words is "forty-two million, five hundred thirty-one thousand, two hundred forty-two".