641044 has 12 divisors (see below), whose sum is σ = 1148224. Its totient is φ = 312984.

The previous prime is 640993. The next prime is 641051. The reversal of 641044 is 440146.

It is a congruent number.

It is an unprimeable number.

641044 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, 1692 + ... + 2035.

2⁶⁴¹⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

641044 is a deficient number, since it is larger than the sum of its proper divisors (507180).

641044 is a wasteful number, since it uses less digits than its factorization.

641044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3774 (or 3772 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 641044 is about 800.6522341192. The cubic root of 641044 is about 86.2242210993.

The spelling of 641044 in words is "six hundred forty-one thousand, forty-four".