643132 has 24 divisors (see below), whose sum is σ = 1304576. Its totient is φ = 271728.

The previous prime is 643129. The next prime is 643183. The reversal of 643132 is 231346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2773 + ... + 2995.

2⁶⁴³¹³² is an apocalyptic number.

It is an amenable number.

643132 is an abundant number, since it is smaller than the sum of its proper divisors (661444).

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

643132 is a wasteful number, since it uses less digits than its factorization.

643132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 335 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 643132 is about 801.9551109632. The cubic root of 643132 is about 86.3177357702.

Adding to 643132 its reverse (231346), we get a palindrome (874478).

The spelling of 643132 in words is "six hundred forty-three thousand, one hundred thirty-two".