641322 has 48 divisors (see below), whose sum is σ = 1572480. Its totient is φ = 187200.

The previous prime is 641317. The next prime is 641327. The reversal of 641322 is 223146.

It is a happy number.

641322 is a `hidden beast` number, since 641 + 3 + 22 = 666.

It is an interprime number because it is at equal distance from previous prime (641317) and next prime (641327).

It is a super-2 number, since 2×641322² = 822587815368, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 641295 and 641304.

It is not an unprimeable number, because it can be changed into a prime (641327) by changing a digit.

641322 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 23 ways as a sum of consecutive naturals, for example, 8079 + ... + 8157.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2⁶⁴¹³²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786240).

641322 is an abundant number, since it is smaller than the sum of its proper divisors (931158).

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

641322 is a wasteful number, since it uses less digits than its factorization.

641322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 136 counting only the distinct ones).

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

The square root of 641322 is about 800.8258237594. The cubic root of 641322 is about 86.2366835144.

Adding to 641322 its reverse (223146), we get a palindrome (864468).

It can be divided in two parts, 6 and 41322, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 641322 in words is "six hundred forty-one thousand, three hundred twenty-two".