641724 has 24 divisors (see below), whose sum is σ = 1527120. Its totient is φ = 209664.

The previous prime is 641713. The next prime is 641747. The reversal of 641724 is 427146.

It is a junction number, because it is equal to n+sod(n) for n = 641694 and 641703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (63630).

2⁶⁴¹⁷²⁴ is an apocalyptic number.

It is an amenable number.

641724 is an abundant number, since it is smaller than the sum of its proper divisors (885396).

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

641724 is a wasteful number, since it uses less digits than its factorization.

641724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069 (or 1067 counting only the distinct ones).

The product of its digits is 1344, while the sum is 24.

The square root of 641724 is about 801.0767753468. The cubic root of 641724 is about 86.2546983368.

It can be divided in two parts, 6417 and 24, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 641724 in words is "six hundred forty-one thousand, seven hundred twenty-four".