42947 has 4 divisors (see below), whose sum is σ = 43656. Its totient is φ = 42240.

The previous prime is 42943. The next prime is 42953. The reversal of 42947 is 74924.

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 42947 - 2² = 42943 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42947.

It is not an unprimeable number, because it can be changed into a prime (42943) 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, 254 + ... + 387.

It is an arithmetic number, because the mean of its divisors is an integer number (10914).

2⁴²⁹⁴⁷ is an apocalyptic number.

42947 is a deficient number, since it is larger than the sum of its proper divisors (709).

42947 is an equidigital number, since it uses as much as digits as its factorization.

42947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708.

The product of its digits is 2016, while the sum is 26.

The square root of 42947 is about 207.2365797826. The cubic root of 42947 is about 35.0195808801.

It can be divided in two parts, 42 and 947, that added together give a palindrome (989).

The spelling of 42947 in words is "forty-two thousand, nine hundred forty-seven".