42547747 has 8 divisors (see below), whose sum is σ = 47109312. Its totient is φ = 38101800.

The previous prime is 42547721. The next prime is 42547751. The reversal of 42547747 is 74774524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-42547747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42547847) 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 7 ways as a sum of consecutive naturals, for example, 28129 + ... + 29602.

It is an arithmetic number, because the mean of its divisors is an integer number (5888664).

Almost surely, 2^42547747 is an apocalyptic number.

42547747 is a deficient number, since it is larger than the sum of its proper divisors (4561565).

42547747 is a wasteful number, since it uses less digits than its factorization.

42547747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57809.

The product of its digits is 219520, while the sum is 40.

The square root of 42547747 is about 6522.8634049779. The cubic root of 42547747 is about 349.1072403832.

It can be divided in two parts, 425477 and 47, that added together give a palindrome (425524).

The spelling of 42547747 in words is "forty-two million, five hundred forty-seven thousand, seven hundred forty-seven".