643342 has 8 divisors (see below), whose sum is σ = 1102896. Its totient is φ = 275712.

The previous prime is 643303. The next prime is 643369. The reversal of 643342 is 243346.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22963 + ... + 22990.

It is an arithmetic number, because the mean of its divisors is an integer number (137862).

2⁶⁴³³⁴² is an apocalyptic number.

643342 is a deficient number, since it is larger than the sum of its proper divisors (459554).

643342 is a wasteful number, since it uses less digits than its factorization.

643342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45962.

The product of its digits is 1728, while the sum is 22.

The square root of 643342 is about 802.0860302985. The cubic root of 643342 is about 86.3271297733.

Adding to 643342 its reverse (243346), we get a palindrome (886688).

The spelling of 643342 in words is "six hundred forty-three thousand, three hundred forty-two".