42459647 has 4 divisors (see below), whose sum is σ = 43041360. Its totient is φ = 41877936.

The previous prime is 42459643. The next prime is 42459649. The reversal of 42459647 is 74695424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42459647 - 2² = 42459643 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 (42459643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290747 + ... + 290892.

It is an arithmetic number, because the mean of its divisors is an integer number (10760340).

Almost surely, 2^42459647 is an apocalyptic number.

42459647 is a deficient number, since it is larger than the sum of its proper divisors (581713).

42459647 is an equidigital number, since it uses as much as digits as its factorization.

42459647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581712.

The product of its digits is 241920, while the sum is 41.

The square root of 42459647 is about 6516.1067363879. The cubic root of 42459647 is about 348.8661183287.

The spelling of 42459647 in words is "forty-two million, four hundred fifty-nine thousand, six hundred forty-seven".