42040605 has 8 divisors (see below), whose sum is σ = 67264992. Its totient is φ = 22421648.

The previous prime is 42040601. The next prime is 42040613. The reversal of 42040605 is 50604024.

It is a happy number.

42040605 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 a cyclic number.

It is not a de Polignac number, because 42040605 - 2² = 42040601 is a prime.

It is a super-3 number, since 3×42040605³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42040601) 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 7 ways as a sum of consecutive naturals, for example, 1401339 + ... + 1401368.

It is an arithmetic number, because the mean of its divisors is an integer number (8408124).

Almost surely, 2^42040605 is an apocalyptic number.

It is an amenable number.

42040605 is a deficient number, since it is larger than the sum of its proper divisors (25224387).

42040605 is a wasteful number, since it uses less digits than its factorization.

42040605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802715.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42040605 is about 6483.8726853633. The cubic root of 42040605 is about 347.7146475053.

Adding to 42040605 its reverse (50604024), we get a palindrome (92644629).

The spelling of 42040605 in words is "forty-two million, forty thousand, six hundred five".