42508647 has 6 divisors (see below), whose sum is σ = 61401392. Its totient is φ = 28339092.

The previous prime is 42508637. The next prime is 42508649. The reversal of 42508647 is 74680524.

42508647 is a `hidden beast` number, since 4 + 2 + 5 + 0 + 8 + 647 = 666.

It is not a de Polignac number, because 42508647 - 2⁸ = 42508391 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 (42508649) 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 5 ways as a sum of consecutive naturals, for example, 2361583 + ... + 2361600.

Almost surely, 2^42508647 is an apocalyptic number.

42508647 is a deficient number, since it is larger than the sum of its proper divisors (18892745).

42508647 is a wasteful number, since it uses less digits than its factorization.

42508647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4723189 (or 4723186 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 42508647 is about 6519.8655660987. The cubic root of 42508647 is about 349.0002681968. Note that the first 3 decimals are identical.

The spelling of 42508647 in words is "forty-two million, five hundred eight thousand, six hundred forty-seven".