42540005 has 8 divisors (see below), whose sum is σ = 51767424. Its totient is φ = 33552400.

The previous prime is 42539989. The next prime is 42540019. The reversal of 42540005 is 50004524.

It is a happy number.

42540005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42540005 - 2⁴ = 42539989 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 59561 + ... + 60270.

It is an arithmetic number, because the mean of its divisors is an integer number (6470928).

Almost surely, 2^42540005 is an apocalyptic number.

It is an amenable number.

42540005 is a deficient number, since it is larger than the sum of its proper divisors (9227419).

42540005 is a wasteful number, since it uses less digits than its factorization.

42540005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119907.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 42540005 is about 6522.2699269503. The cubic root of 42540005 is about 349.0860645482.

Adding to 42540005 its reverse (50004524), we get a palindrome (92544529).

The spelling of 42540005 in words is "forty-two million, five hundred forty thousand, five".