641442 has 8 divisors (see below), whose sum is σ = 1282896. Its totient is φ = 213812.

The previous prime is 641441. The next prime is 641453. The reversal of 641442 is 244146.

It is a sphenic number, since it is the product of 3 distinct primes.

641442 is an admirable number.

It is a super-2 number, since 2×641442² = 822895678728, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (641441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53448 + ... + 53459.

It is an arithmetic number, because the mean of its divisors is an integer number (160362).

2⁶⁴¹⁴⁴² is an apocalyptic number.

641442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

641442 is a wasteful number, since it uses less digits than its factorization.

641442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106912.

The product of its digits is 768, while the sum is 21.

The square root of 641442 is about 800.9007429139. The cubic root of 641442 is about 86.2420618613.

Adding to 641442 its reverse (244146), we get a palindrome (885588).

It can be divided in two parts, 64144 and 2, that added together give a palindrome (64146).

The spelling of 641442 in words is "six hundred forty-one thousand, four hundred forty-two".