641222 has 4 divisors (see below), whose sum is σ = 961836. Its totient is φ = 320610.

The previous prime is 641213. The next prime is 641227. The reversal of 641222 is 222146.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×641222² = 822331306568, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 641222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641227) by changing a digit.

641222 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 as a sum of consecutive naturals, namely, 160304 + ... + 160307.

It is an arithmetic number, because the mean of its divisors is an integer number (240459).

2⁶⁴¹²²² is an apocalyptic number.

641222 is a deficient number, since it is larger than the sum of its proper divisors (320614).

641222 is a wasteful number, since it uses less digits than its factorization.

641222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320613.

The product of its digits is 192, while the sum is 17.

The square root of 641222 is about 800.7633857763. The cubic root of 641222 is about 86.2322010461.

Adding to 641222 its reverse (222146), we get a palindrome (863368).

The spelling of 641222 in words is "six hundred forty-one thousand, two hundred twenty-two".