42406687 has 8 divisors (see below), whose sum is σ = 46853856. Its totient is φ = 38176512.

The previous prime is 42406657. The next prime is 42406709. The reversal of 42406687 is 78660424.

42406687 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 a de Polignac number, because none of the positive numbers 2^k-42406687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42406627) 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, 53838 + ... + 54619.

It is an arithmetic number, because the mean of its divisors is an integer number (5856732).

Almost surely, 2^42406687 is an apocalyptic number.

42406687 is a deficient number, since it is larger than the sum of its proper divisors (4447169).

42406687 is a wasteful number, since it uses less digits than its factorization.

42406687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108497.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 42406687 is about 6512.0416921270. The cubic root of 42406687 is about 348.7210108525.

The spelling of 42406687 in words is "forty-two million, four hundred six thousand, six hundred eighty-seven".