641930 has 16 divisors (see below), whose sum is σ = 1206144. Its totient is φ = 245520.

The previous prime is 641929. The next prime is 641959. The reversal of 641930 is 39146.

641930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 641896 and 641905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166 + ... + 1625.

It is an arithmetic number, because the mean of its divisors is an integer number (75384).

2⁶⁴¹⁹³⁰ is an apocalyptic number.

641930 is a deficient number, since it is larger than the sum of its proper divisors (564214).

641930 is a wasteful number, since it uses less digits than its factorization.

641930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 641930 is about 801.2053419692. The cubic root of 641930 is about 86.2639268976.

The spelling of 641930 in words is "six hundred forty-one thousand, nine hundred thirty".