42457647 has 16 divisors (see below), whose sum is σ = 60571520. Its totient is φ = 26373600.

The previous prime is 42457627. The next prime is 42457651. The reversal of 42457647 is 74675424.

It is not a de Polignac number, because 42457647 - 2¹¹ = 42455599 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 (42457607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2629 + ... + 9582.

It is an arithmetic number, because the mean of its divisors is an integer number (3785720).

Almost surely, 2^42457647 is an apocalyptic number.

42457647 is a deficient number, since it is larger than the sum of its proper divisors (18113873).

42457647 is a wasteful number, since it uses less digits than its factorization.

42457647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12294.

The product of its digits is 188160, while the sum is 39.

The square root of 42457647 is about 6515.9532687090. The cubic root of 42457647 is about 348.8606406321.

The spelling of 42457647 in words is "forty-two million, four hundred fifty-seven thousand, six hundred forty-seven".