641046 has 16 divisors (see below), whose sum is σ = 1465344. Its totient is φ = 183144.

The previous prime is 640993. The next prime is 641051. The reversal of 641046 is 640146.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

641046 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, 7590 + ... + 7673.

It is an arithmetic number, because the mean of its divisors is an integer number (91584).

2⁶⁴¹⁰⁴⁶ is an apocalyptic number.

641046 is an abundant number, since it is smaller than the sum of its proper divisors (824298).

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

641046 is a wasteful number, since it uses less digits than its factorization.

641046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15275.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 641046 is about 800.6534830999. The cubic root of 641046 is about 86.2243107698.

Subtracting from 641046 its reverse (640146), we obtain a square (900 = 30²).

The spelling of 641046 in words is "six hundred forty-one thousand, forty-six".