42540241 has 4 divisors (see below), whose sum is σ = 43237684. Its totient is φ = 41842800.

The previous prime is 42540227. The next prime is 42540263. The reversal of 42540241 is 14204524.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 355216 + 42185025 = 596^2 + 6495^2 .

It is a cyclic number.

It is not a de Polignac number, because 42540241 - 2¹¹ = 42538193 is a prime.

It is a super-3 number, since 3×42540241³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42540541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348630 + ... + 348751.

It is an arithmetic number, because the mean of its divisors is an integer number (10809421).

Almost surely, 2^42540241 is an apocalyptic number.

It is an amenable number.

42540241 is a deficient number, since it is larger than the sum of its proper divisors (697443).

42540241 is an equidigital number, since it uses as much as digits as its factorization.

42540241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697442.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 42540241 is about 6522.2880187860. The cubic root of 42540241 is about 349.0867100909.

Adding to 42540241 its reverse (14204524), we get a palindrome (56744765).

The spelling of 42540241 in words is "forty-two million, five hundred forty thousand, two hundred forty-one".