641558 has 8 divisors (see below), whose sum is σ = 972552. Its totient is φ = 317376.

The previous prime is 641551. The next prime is 641579. The reversal of 641558 is 855146.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 641558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1460 + ... + 1847.

It is an arithmetic number, because the mean of its divisors is an integer number (121569).

2⁶⁴¹⁵⁵⁸ is an apocalyptic number.

641558 is a deficient number, since it is larger than the sum of its proper divisors (330994).

641558 is a wasteful number, since it uses less digits than its factorization.

641558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406.

The product of its digits is 4800, while the sum is 29.

The square root of 641558 is about 800.9731581021. The cubic root of 641558 is about 86.2472602924.

The spelling of 641558 in words is "six hundred forty-one thousand, five hundred fifty-eight".