641072 has 20 divisors (see below), whose sum is σ = 1257360. Its totient is φ = 316608.

The previous prime is 641057. The next prime is 641077. The reversal of 641072 is 270146.

It is not an unprimeable number, because it can be changed into a prime (641077) by changing a digit.

641072 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1454 + ... + 1842.

It is an arithmetic number, because the mean of its divisors is an integer number (62868).

2⁶⁴¹⁰⁷² is an apocalyptic number.

It is an amenable number.

641072 is a deficient number, since it is larger than the sum of its proper divisors (616288).

641072 is a wasteful number, since it uses less digits than its factorization.

641072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 641072 is about 800.6697196722. The cubic root of 641072 is about 86.2254764697.

The spelling of 641072 in words is "six hundred forty-one thousand, seventy-two".