641744 has 20 divisors (see below), whose sum is σ = 1309440. Its totient is φ = 303840.

The previous prime is 641713. The next prime is 641747. The reversal of 641744 is 447146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641747) 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, 752 + ... + 1359.

It is an arithmetic number, because the mean of its divisors is an integer number (65472).

2⁶⁴¹⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

641744 is an abundant number, since it is smaller than the sum of its proper divisors (667696).

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

641744 is a wasteful number, since it uses less digits than its factorization.

641744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138 (or 2132 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 641744 is about 801.0892584475. The cubic root of 641744 is about 86.2555944001.

The spelling of 641744 in words is "six hundred forty-one thousand, seven hundred forty-four".