42424531 has 4 divisors (see below), whose sum is σ = 43411192. Its totient is φ = 41437872.

The previous prime is 42424519. The next prime is 42424561. The reversal of 42424531 is 13542424.

It is a happy number.

42424531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42424531 - 2²¹ = 40327379 is a prime.

It is a super-2 number, since 2×42424531² = 3599681661139922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42424496 and 42424505.

It is not an unprimeable number, because it can be changed into a prime (42424561) by changing a digit.

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, 493266 + ... + 493351.

It is an arithmetic number, because the mean of its divisors is an integer number (10852798).

Almost surely, 2^42424531 is an apocalyptic number.

42424531 is a deficient number, since it is larger than the sum of its proper divisors (986661).

42424531 is an equidigital number, since it uses as much as digits as its factorization.

42424531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986660.

The product of its digits is 3840, while the sum is 25.

The square root of 42424531 is about 6513.4116252545. The cubic root of 42424531 is about 348.7699159158.

Adding to 42424531 its reverse (13542424), we get a palindrome (55966955).

The spelling of 42424531 in words is "forty-two million, four hundred twenty-four thousand, five hundred thirty-one".