643002 has 16 divisors (see below), whose sum is σ = 1327872. Its totient is φ = 207360.

The previous prime is 642997. The next prime is 643009. The reversal of 643002 is 200346.

It is not an unprimeable number, because it can be changed into a prime (643009) 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 7 ways as a sum of consecutive naturals, for example, 1543 + ... + 1914.

It is an arithmetic number, because the mean of its divisors is an integer number (82992).

2⁶⁴³⁰⁰² is an apocalyptic number.

643002 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

643002 is an abundant number, since it is smaller than the sum of its proper divisors (684870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643002 is a wasteful number, since it uses less digits than its factorization.

643002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 643002 is about 801.8740549488. The cubic root of 643002 is about 86.3119194102.

Adding to 643002 its reverse (200346), we get a palindrome (843348).

The spelling of 643002 in words is "six hundred forty-three thousand, two".