641232 has 60 divisors (see below), whose sum is σ = 1848964. Its totient is φ = 207360.

The previous prime is 641227. The next prime is 641239. The reversal of 641232 is 232146.

It is a happy number.

641232 is a `hidden beast` number, since 641 + 23 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 156816 + 484416 = 396^2 + 696^2 .

It is a super-2 number, since 2×641232² = 822356955648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641239) by changing a digit.

641232 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8748 + ... + 8820.

2⁶⁴¹²³² 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 641232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924482).

641232 is an abundant number, since it is smaller than the sum of its proper divisors (1207732).

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

641232 is a wasteful number, since it uses less digits than its factorization.

641232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 139 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 641232 is about 800.7696297937. The cubic root of 641232 is about 86.2326493139.

Adding to 641232 its reverse (232146), we get a palindrome (873378).

It can be divided in two parts, 64 and 1232, that added together give a 4-th power (1296 = 6⁴).

The spelling of 641232 in words is "six hundred forty-one thousand, two hundred thirty-two".