42347 has 8 divisors (see below), whose sum is σ = 46656. Its totient is φ = 38272.

The previous prime is 42337. The next prime is 42349. The reversal of 42347 is 74324.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42347 - 2⁴ = 42331 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 773 + ... + 825.

It is an arithmetic number, because the mean of its divisors is an integer number (5832).

2⁴²³⁴⁷ is an apocalyptic number.

42347 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

42347 is a deficient number, since it is larger than the sum of its proper divisors (4309).

42347 is a wasteful number, since it uses less digits than its factorization.

42347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117.

The product of its digits is 672, while the sum is 20.

The square root of 42347 is about 205.7838672005. The cubic root of 42347 is about 34.8557326889.

It can be divided in two parts, 423 and 47, that multiplied together give a square (19881 = 141²).

The spelling of 42347 in words is "forty-two thousand, three hundred forty-seven", and thus it is an iban number.