42047471 has 4 divisors (see below), whose sum is σ = 42760200. Its totient is φ = 41334744.

The previous prime is 42047459. The next prime is 42047479. The reversal of 42047471 is 17474024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42047471 is a prime.

It is a super-3 number, since 3×42047471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42047479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356276 + ... + 356393.

It is an arithmetic number, because the mean of its divisors is an integer number (10690050).

Almost surely, 2^42047471 is an apocalyptic number.

42047471 is a deficient number, since it is larger than the sum of its proper divisors (712729).

42047471 is an equidigital number, since it uses as much as digits as its factorization.

42047471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712728.

The product of its (nonzero) digits is 6272, while the sum is 29.

The square root of 42047471 is about 6484.4021312685. The cubic root of 42047471 is about 347.7335758629.

The spelling of 42047471 in words is "forty-two million, forty-seven thousand, four hundred seventy-one".