643052 has 12 divisors (see below), whose sum is σ = 1130976. Its totient is φ = 319920.

The previous prime is 643051. The next prime is 643061. The reversal of 643052 is 250346.

It is not an unprimeable number, because it can be changed into a prime (643051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277 + ... + 1707.

It is an arithmetic number, because the mean of its divisors is an integer number (94248).

2⁶⁴³⁰⁵² is an apocalyptic number.

It is an amenable number.

643052 is a deficient number, since it is larger than the sum of its proper divisors (487924).

643052 is a wasteful number, since it uses less digits than its factorization.

643052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 643052 is about 801.9052313085. The cubic root of 643052 is about 86.3141565645.

Adding to 643052 its reverse (250346), we get a palindrome (893398).

The spelling of 643052 in words is "six hundred forty-three thousand, fifty-two".