641860 has 24 divisors (see below), whose sum is σ = 1370880. Its totient is φ = 252384.

The previous prime is 641843. The next prime is 641863. The reversal of 641860 is 68146.

It is not an unprimeable number, because it can be changed into a prime (641863) by changing a digit.

641860 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 in 7 ways as a sum of consecutive naturals, for example, 1101 + ... + 1579.

It is an arithmetic number, because the mean of its divisors is an integer number (57120).

2⁶⁴¹⁸⁶⁰ is an apocalyptic number.

It is an amenable number.

641860 is an abundant number, since it is smaller than the sum of its proper divisors (729020).

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

641860 is a wasteful number, since it uses less digits than its factorization.

641860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 641860 is about 801.1616565962. The cubic root of 641860 is about 86.2607912004.

The spelling of 641860 in words is "six hundred forty-one thousand, eight hundred sixty".