42047547 has 8 divisors (see below), whose sum is σ = 56271360. Its totient is φ = 27927720.

The previous prime is 42047539. The next prime is 42047561. The reversal of 42047547 is 74574024.

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

It is not a de Polignac number, because 42047547 - 2³ = 42047539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42047147) 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, 25047 + ... + 26672.

It is an arithmetic number, because the mean of its divisors is an integer number (7033920).

Almost surely, 2^42047547 is an apocalyptic number.

42047547 is a deficient number, since it is larger than the sum of its proper divisors (14223813).

42047547 is a wasteful number, since it uses less digits than its factorization.

42047547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51993.

The product of its (nonzero) digits is 31360, while the sum is 33.

The square root of 42047547 is about 6484.4079914823. The cubic root of 42047547 is about 347.7337853700.

The spelling of 42047547 in words is "forty-two million, forty-seven thousand, five hundred forty-seven".