641432 has 32 divisors (see below), whose sum is σ = 1354320. Its totient is φ = 282240.

The previous prime is 641419. The next prime is 641437. The reversal of 641432 is 234146.

It is a happy number.

It is a super-2 number, since 2×641432² = 822870021248, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 641432.

It is not an unprimeable number, because it can be changed into a prime (641437) 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, 3158 + ... + 3354.

2⁶⁴¹⁴³² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (677160).

641432 is an abundant number, since it is smaller than the sum of its proper divisors (712888).

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

641432 is a wasteful number, since it uses less digits than its factorization.

641432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 247 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 641432 is about 800.8944999187. The cubic root of 641432 is about 86.2416136914.

Adding to 641432 its reverse (234146), we get a palindrome (875578).

It can be divided in two parts, 6414 and 32, that added together give a palindrome (6446).

The spelling of 641432 in words is "six hundred forty-one thousand, four hundred thirty-two".